Wednesday, November 30, 2016

Ruffneck Unit Heaters from Anderson-Bolds

Anderson-Bolds now has Ruffneck Heaters for Cold Weather

Ruffneck™ from CCI Thermal Technologies Inc. is renowned for its rugged, reliable and versatile heavy-duty explosion-proof heaters, heating systems and heating accessories. Ruffneck has a long and proud history of supplying quality heating products for the harshest industrial environments to a worldwide customer base for over 30 years. The Ruffneck™ line has enhanced CCI's position as one of North America's leading manufacturers of industrial heating equipment.
Ruffneck™ is well-known in the industry for its "ship the heat in a week" policy, where 95% of all standard orders are shipped within one week of order placement.

RGX - Heavy Duty Unit Heater

CE - cUS - CSA
The Ruffneck™ RGX Heavy Duty Unit Heater is specifically engineered for heavy duty use in industrial environments, such as mine shafts, pulp & paper mills, hoist houses, welding shops, maintenance shops, sewage treatment plants, chemical plants and more. The heavy duty construction of this heater reduces the downtime and maintenance costs associated with standard design heaters.
  • models range from 15-50kW and 208-600V
  • 40 and 50 kW units incorporate split loads (50%) for remotely controlled energy management systems
  • factory-installed transformers, contactors and thermostats where specified
  • individually adjustable air flow louvres
  • factory-balanced aluminum fan blade
  • NEMA 12 standard, full-sized control panel with hinged removable door
  • epoxy coated 14-gauge steel cabinet for superior corrosion-resistance; optional stainless steel available
  • fan delay in "ON" and "OFF" cycles
  • "Fan Only" terminals for connection to remote switch
  • ceiling mounting bracket supplied
  • motor mounted outside the element bundle eliminates premature failure due to overheating and provides easy access for motor maintenance
  • robust finned tubular sheathed elements with epoxy sealed terminals eliminate contamination from moisture and airborne impurities
  • numerous optional factory installed features to meet specific customer requirements; numerous accessories for field installation available
  • CSA C/US approved for horizontal and vertical air flow; CE approved


RGE - Regular Duty Unit Heater

CE - cUS - CSA
The Ruffneck™ RGE Regular Duty Unit Heater is designed for use in regular duty industrial and commercial space heating applications. This heater is ideal for use in factories, warehouses, parking garages, boiler rooms, arenas, grandstands, mechanical rooms, shopping malls, display areas, commercial storefronts and more. This heater's robust design and top quality construction surpasses the standards of most competitive models.
  • models range from 2-40kW and 208-600V
  • phosphate coated, epoxy painted 18-gauge steel cabinet
  • field convertible from 1 to 3 phase
  • tubular (Calrod® type)* heating elements
  • individually adjustable air flow louvres
  • permanently lubricated motors
  • overheat protection
  • ceiling mounting bracket supplied
  • motors mounted outside element bundle
  • numerous optional factory installed features to meet specific customer requirements, including optional thermostats and controls, and optional wall bracket
  • numerous accessories for field installation available
  • CSA C/US approved for horizontal air flow; CE approved

CR1 - Triton™ Corrosion-Resistant Washdown Unit Heater

cUS - EAC
The Ruffneck™ CR1 Triton™ Unit Heater is a corrosion-resistant washdown heater, designed for non-hazardous locations and applications using water pressure of less than 70 psi.
  • models range from 3 kW to 39 kW and 208V to 600V
  • NEMA Type 4X construction for increased safety and protection against water penetration
  • epoxy-coated fan blade and 16-gauge stainless steel cabinet for increased corrosion resistance
  • custom configured stainless steel elements for improved heat distribution and corrosion protection
  • optional built-in accessories for flexibility and reduced field installation costs
  • stainless steel wall/ceiling mounting kit for flexible mounting options, which allow the heater to be mounted to a maximum of 45° from vertical
  • stainless steel temperature high-limit for increased safety and reliability
  • UL-listed Type 4X for coast guard and marine applications; EAC Marked

FE2 - Explosion-Proof Electric Air Unit Heater

CE - ATEX - EAC
The Ruffneck™ FE2 heaters are CE Marked & ATEX Approved to Directive 94/9/EC for use in hazardous locations. They are designed for dry indoor industrial applications such as oil refineries, petrochemical plants, pulp and paper mills, hazardous waste storage facilities, wastewater treatment plants, etc., where specific explosive gases or dusts maybe present.
All FE2 heaters feature the VacuCore® liquid-to-air heat exchanger, which provides greater efficiency, faster warm-up and even heat distribution across the face of the exchanger. The entire core can be replaced easily and safely with a new core if required.
  • models range from 2.5-23.1kW and 220-440V
  • heater core assembly is contained in a sturdy, epoxy-coated, 12-gauge steel cabinet, which also houses the motor and fan assembly
  • adjustable louvers allow directional control of airflow
  • aluminum fan blades with steel spider and hub; narrow gap, two-piece fan guard provides safety against all moving parts
  • zinc-plated fasteners for corrosion protection
  • three long-life, low watt density, high grade metal-sheathed elements
  • optional built-in thermostat
  • standard metric field connection
  • CE/ATEX II2, Ex d IIA & IIB T3 Zones 1 & 2, EAC marked

FX5 - Explosion-Proof Electric Air Unit Heater

cUS
The Ruffneck™ FX5 Explosion-Proof Electric Air Unit Heater is designed for the harshest industrial environments and intended for dry indoor industrial applications such as oil refineries, petrochemical plants, pulp and paper mills, grain elevators, hazardous waste storage facilities, wastewater treatment plants. This heater is ideal anywhere that specific explosive gases or dusts may be present.
  • models range from 3-35kW and 208-600V
  • heater core assembly is contained in a sturdy, epoxy-coated, 12-gauge steel cabinet (optional Heresite® coating and stainless steel construction for corrosive environments available), which also houses the motor and fan assembly
  • adjustable louvres allow directional control of airflow
  • narrow gap, two-piece fan guard provides safety against all moving parts
  • automatic reset bimetal high-limit; secondary ambient high-limit for added safety
  • UL-certified and approved for the following Hazardous Locations Classifications: Class I, Divisions 1 & 2, Groups C & D; Class II, Division 1, Groups E, F & G and Class II, Division 2, Groups F & G. Class I, Zones 1 & 2, Groups IIA & IIB; Temperature code T3B 165°C (329°F)

FX5-SD - Explosion-Proof Electric Air Unit Heater

cUS
The FX5 Severe Duty (SD) is the next generation Ruffneck™ explosion-proof electric air heater, built for severe duty applications that can lead to accelerated wear of electrical components and damage to the heater core, including locations with fluctuating power quality, temporary power generation, high vibration, dirty or corrosive atmospheres or extended maintenance intervals.
  • Models range from 3 – 35 kW and 208 – 600V
  • Shunt trip line power circuit breaker
  • Redundant high limit protection
  • 75 Amp industrial contactor
  • Explosion-proof Arctic Duty motor
  • Epoxy-coated, 12-gauge steel cabinet
  • Optional Heresite® coating and stainless steel construction for corrosive environments
  • CULUS certified and approved for the following Hazardous Locations Classifications: Class I, Divisions 1 & 2, Groups C & D; Class II, Division 1, Groups E, F & G and Class II, Division 2, Groups F & G. Class I, Zones 1 & 2, Groups IIA & IIB; Temperature code T3B 165°C (329°F)


Please contact Anderson-Bolds for more information or for a quote.
216-360-9800

Our contact Form is HERE.


Monday, October 31, 2016

Air Door/Curtain Advantages for Businesses

Reasons to Use Air Curtains from Anderson-Bolds

Fall is Here...and Colder Winter is Coming

Researchers have established...warm temperatures cause people to buy more. And if you're a retail operator or run a foodservice establishment, maintaining balmy temps mean guests stay longer, spend more and perceive your offering more positively. But when winter comes...and the cold hits...does it have to fade away? 
When winter gusts and frigid temps threaten the comfort of your indoors...and your sales.. via opening doors, Mars can make a difference. We're prepared to put the stop to winter with durable heated air units that will consistently warm the air in front of your entry doors, dock doors, pass-thru windows and receiving doors. 
With products like the Mars Windguard for your beefiest dock door to the Mars Standard model as a strong sentry for entry doors, you can protect your business and back account from winter's onslaught. Prepare now and reap the benefits starting in November.

Pesky Flying Pests Stay in the Bullseye

Mars has long had the flying insect in our crosshairs because they annoy diners and retail patrons, they spread bacteria and viruses, and they imply lack of operational cleanliness. Now with the Zika virus’ link to mosquitos – while a health threat seemingly under control in North American for now – we are given further proof that flying insects, be they mosquitos, flies or fleas, are a threat to the food supply and human health. Mars has been offering defense for foodservice and retail operators for over five decades and has had a team dedicated to creating best-in-class products to thwart the pesky flying annoyances that can also turn deadly. While the best defense against mosquito-borne illnesses is a vaccine, until we have one, we’ll continue to do our part to give foodservice and retail unit owners and operators with the best invisible protection for entryways and doors.

Sustainability and the Air Curtain -- BFF's

Hardly an industry sector hasn’t been influenced by the sustainability movement and the increased emphasis for all of us to be better stewards of Mother Earth. In the last quarter of 2015, Progressive Grocer featured an overview of changes supermarket operators are using to go green amid pressures from aware consumers as well as regulatory shifts that force change. Refrigeration remains a top concern for grocery outlets and is an area of focus for researchers and designers hoping to make the changes that will reduce carbon emissions. The Progressive Grocer article authors make note of the efficiencies realized when spot heating at loading docks is used in favor of an whole-area heating plan. Their findings include a suggestion for facilities to use “air curtains over loading docks to save energy by providing an invisible wall of heated air in the winter and for their ability to impede dust and insects all year long”. Whether you operate a supermarket, a retail store or a manufacturing plant, the Mars air curtain is suitable for a myriad of environments when spot heating can be much more economical than wide area conditioning. Our team is always available to share best practices and help your team develop a customized plan.

Life, Liberty and the Pursuit of Physical Comfort

The season to keep hot air inside and the cold, blustery wind outdoors arrives yet again. If typical cold gusts are annoying enough in themselves, this year's forecasted El Niño is predicted to be among the strongest on record and is likely to influence weather and climate patterns in the winter of 2016 by impacting the position of the Pacific jet stream.  “A strong El Niño is in place and should exert a strong influence over our weather this winter,” said Mike Halpert, deputy director, NOAA’s Climate Prediction Center. “While temperature and precipitation impacts associated with El Niño are favored, El Niño is not the only player. Cold-air outbreaks and snow storms will likely occur at times this winter. However, the frequency, number and intensity of these events cannot be predicted on a seasonal timescale.” All control is not lost though. The Mars heated air curtain enables retail customers, manufacturing workers and staff and customers in every kind of space control over their comfort with its ability to contribute to uniformity of temperature. And for operators, the ability to protect their internal environments from dust, wind and cold with the Mars heated air curtain also comes with the economic benefit of lower utility costs. We can help you prepare for the uncertainty of El Niño now and put some barriers in place no matter what this winter season dishes up…

Air Curtains to the Rescue


While mini vans might be the best way to keep kids separated, the Mars air curtain is the best choice to create environmental separation. Recently The Louisiana State Museum in New Orleans re-opened its 1850 House attraction in the French Quarter after a nine-month closure due to a mold outbreak. The Lower Pontalba, which showcases hundreds of antebellum antiques and pieces of artwork, suffered a mold spore outbreak after a malfunctioning air-conditioning system distributed the toxin through several sections of the 3,600 sq ft space. Air curtains came to the rescue to create a continuous wall of air to create climatic separation and joined forces with air returns and automatic door closers for added security. When your environment would benefit from a bit of separation, get in touch with the Mars technical team and learn more about the thousands of environments we've helped to better with separation, climate control and consistent temperature control and cost savings using our powerful solution. 

Call Anderson-Bolds for your Air Curtain / Air Door needs.
216-360-9800

Monday, September 12, 2016

Temperature Control by Fenwal

Anderson-Bolds and Fenwal Discussion of Temperature Control and Controllers

Contact Anderson-Bolds HERE.

Buy Fenwal THERMOSWITCHES HERE.

The results you get with a precision temperature controller, as with any tool, depend on how skillfully it is used. It will produce close control only when the design and operating conditions of the system help it to respond quickly and accurately.
A controller is only one part of a heated system. Its job is to sense temperature at a particular point in the system, and, on the basis of what it senses, actuate some other device which changes the quantity of heat flowing into the system. A controller can respond only to what it sees at its particular location. It cannot react to a temperature rise or fall somewhere in the system until that information arrives at the sensing element. Generally, it cannot compensate for too much or too little heat being put into the system when the heat source is improperly sized. And, most important, it has no way of recognizing whether the temperature in its vicinity truly represents the temperature at the work area. Regardless of the capabilities of the controller, it can control no more closely than the design of the system permits.



1. Heated System?
There are four elements in a heated system, ail of which contribute in some way to control performance.

A. Work (or Load): The material or product which must be maintained at a controlled temperature. The heat demand of the work may be steady; that is, the same material must be held at constant temperature for a prolonged period, such as a culture in an incubating oven. More commonly, the heat demand of the work is variable and cyclic; that is, cold material periodically enters the system, absorbs heat, is removed and replaced by another batch of cold material. An example of a variable system is a molding press which receives a batch of cool plastic, forms, cures and ejects it and repeats the cycle several times a minute.

B. Heat Source: The device which delivers the heat used by the system. The source may be electrical heaters, oil and gas-fired heaters, or any other source. The process may be exothermic; i.e., generate its own heat.

C. Heat Transfer Medium: The material which transmits the heat from the heat source to the work. The material may be a solid, liquid, or gas. Its transfer characteristics play a large part in determining how fast temperature changes are transmitted through the system and, consequently, how closely the system can be controlled.

D. Controller: The instrument which controls the heat flow on the basis of the discrepancy between the sensed temperature and the controllers set point.

2. The Meanings of “accuracy”.

The term "control accuracy" is frequently used rather loosely to denote several distinct and different concepts. For the sake of clarity, these concepts will be labelled and discussed briefly. (See Figure 1)

A. System Bandwidth: the total temperature variation—measured at some point in the system, usually at the work area. For example (See Figure 1), if the maximum and minimum temperatures in a system are 203 and 199°F, the bandwidth is 4 degrees. (Commonly this is referred to as ± 2°, though correct expression is 4°.)

The sensitivity of the controller contributes only partially to determining the bandwidth; several other factors relating to the over-all system (described in the following sections ) contribute importantly and sometimes decisively. Maintaining a very narrow bandwidth may be the primary goal to prevent overshoot in products or processes which are being heated close to their decomposition, vaporization or other critical point. Narrow bandwidth, by itself, does not guarantee constant temperature, since the mean temperature can drift. In many cases, constancy of mean temperature is relatively more important than a narrow bandwidth.

B. Mean Temperature: the numerical average of the maximum and minimum temperatures reached at some point in the system. For example (See Figure 1)  for a maximum of 203 and a minimum of 199, the mean temperature is 201. In a large number of systems, maintaining the mean temperature relatively constant, rather than maintaining a very narrow bandwidth, is the practical objective. The mean temperature (also referred to as the "control point") may or may not be the same temperature as the controller's set point. When they are not die same, an offset exists.

C. Offset: the difference between any two temperatures, such as between the setting of the controller and the mean temperature of the load when the system is at a steady state. In Figure 1, the offset is 1°.

D. Controller Operating Differential: the difference between sensing element temperature at make and break of the controller's contacts when the controller is cycled in a specified control system. For example (Figure 1), when the controller's contacts are closed at 200.6 and open at 201.4, its operating differential in that particular system is 0.8 degrees. For some types of controllers the operating differential is affected by electrical load, set point and physical location, so that it is usually larger than the controller's resolution sensitivity.

E. Controller Resolution Sensitivity (sometimes called inherent sensitivity) : the minimum temperature difference necessary to operate the controller's contacts under ideal conditions.

3. A Practical Approach to Accuracy

The user of a thermal system is interested in one basic question: is the temperature control accurate enough to operate his product or process satisfactorily? Control requirements are far less stringent in a waffle iron than in a crystal oscillator oven. Maintaining exact temperature in a wax applicator tank is less critical than in a laboratory viscosimeter. The point is that exact control of a system takes time, care and money. Moreover, it takes highly sensitive measuring instruments and indicators—and frequent recalibration in service—to tell just how good the control is. Eliminating the last degree or fraction of a degree of temperature deviation is costly and should be done only for sound practical reasons.
Nonetheless, good control is attainable with standard instruments. To be sure, control will be no better than the capabilities of the controller, but unless the system is designed as an entity, there is little assurance that the controller can deliver what the user expects of it.

4. What Affects Control Accuracy?

System bandwidth and constancy of mean temperature are the overall measures of control accuracy. They are affected by many factors:
A. Temperature Gradients—the range of temperature variation throughout the system at any given instant.
B. Thermal Lag—the time delay for a temperature change in one part of the system to be felt in other parts of the system.
C. Location of the Controller's Sensing Element—its placement relative to heat source and load.
D. Response Speed and Sensitivity of the Controller—these and other characteristics make up inherent controller accuracy. They determine how well it is suited for a given application.
E. Heat Balance—the capacity of the heat source in relation to heat demand from the work, plus heat losses.


5. How Heat Moves

Heat, like water, seeks its own level. It moves only from a higher to a lower temperature zone at a rate depending on the temperature difference and the conductivity or emissivity of the heat transfer medium. The three methods of heat transfer are: conduction, convection and radiation.

A. Conduction takes place in solids, liquids and gases. The heat is transmitted in a kind of chain reaction by the rubbing action of a "hot" or higher energy particle with an adjacent "cool" lower energy particle, while the particles remain in the same relative position to each other. A commonplace example is the gradual heating of the upper end of a spoon when the lower end is immersed in a hot cup of coffee.

B. Convection takes place in liquids and gases. It occurs when a stream of warm particles rises, mixes and diffuses into a cooler area. Convection from a heat source at the bottom of the structure is a common method of heating ovens and water tanks. Natural convection currents move slowly and it requires a fairly long time for a container of any reasonable size to reach uniform temperature. This makes accurate control practically impossible. When good control is demanded in ovens and liquid baths, forced convection, produced by blowers, agitators or recirculation lines will be necessary.

c. Radiation is a form of energy transmission which is emitted from a heated body. Radiant energy needs no heat transfer medium and thus can travel in a vacuum. The most familiar example of radiant energy is sunlight, which travels through the nearly empty outer space, the denser atmosphere of the earth and is finally absorbed by buildings and pavements. These structures then act as secondary heat sources by radiating much of the absorbed heat back to the surrounding atmosphere.
In most systems all three methods of heat transfer are present. A platen, internally heated by an electric heater, heats the work by conduction. However, heat may be lost from the surfaces of the platen both by convection and conduction to metal parts touching the platen. In an oven the walls and internal structures also become heated and these in turn radiate and convect heat back into the oven cavity.
These secondary heat sources, while useful in maintaining a stable heat level in the system, can nevertheless cause difficulty in a closely- controlled system by creating local concentrations of heat which can bias the sensing element if it is not properly shielded. Conduction and radiation of heat away from the sensing element by supporting fittings and fastenings can similarly produce a sensing error. Thus, the various ways in which heat moves in and out of a system have a direct, practical influence on temperature control.

Contact Anderson-Bolds HERE to discuss your temperature control application.

Buy Fenwal THERMOSWITCHES HERE.


Anderson-Bolds
Since 1934
Cleveland, Ohio
216-360-9800
www.anderson-bolds.com











Wednesday, September 7, 2016

Calculating Heat Kilowatts and Specific Heat Values

Anderson-Bolds has been providing heating solutions to industry since 1934.

Here is the quick and simple heating equation and variables needed to heat an application.

Required BTU's or KW are calculated with this equation.

WxSHxΔT =BTU/hour

Weight (lb) of material being heated = W
Specific Heat of material = SH
Change in Temperature needed or Delta T = ΔT

To Convert BTUs to KW, divide the BTUs by 3413.

This equation only yields the heat input and does not take into consideration any heat losses or heat gains within a process. If an application is heating water but then a solid piece of metal enters into the water, the solid mud be heated too as well as the tank to achieve the goal system KW required.

Below are specific Heat values for common substances along with weights.
Specific Heats listed are all below 1 except Water which is 1.

Solid weights are per cubic foot and liquid weights are per gallon in pounds.

Aluminum   .23 SH  and  160 pounds
Asphalt       .40  and  65 pounds
Brass    .10  and 525 pounds
Bricks/masonry  .22 and 140 pounds
Carbon  .204  and  ??
Copper  .10  and  550 pounds
Glass   .20  and   165 pounds
Graphite   .20  and  130 pounds
Iron  .13  and  450 pounds
Lead  .031   and   710 pounds
Nickel  .11  and  550 pounds
Paper   .45  and   58 pounds
Paraffin  .70  and 56 pounds
Rubber  .40  and  95 pounds
Silver  .057  and  655 pounds
Solder   .04  and  580 pounds
Steel   .12  and  490 pounds
Sugar  .30  and 105  pounds
Sulphur   .203  and  125 pounds
Tin  .56  and 455 pounds
Wood (oak)  .45  and 50 pounds
Wood (pine)  .45  and 34 pounds

Liquids
Acetic Acid  .472  and 8.81 pounds
Alcohol  .65  and 7.35 pounds
Benzine  .45  and 7.49 pounds
Ether  .503  and  6.15 pounds
Glycerine   .58  and 10.58 pounds
Mercury  .0333  and  113  pounds
Oil   .47   and  7.76  pounds
Petroleum   .51  and 7.49 pounds
Turpentine   .41  and   7.22 pounds
Water   1.0  and  8.34  pounds  (Most Difficult to Heat)

Please contact Anderson-Bolds HERE to discuss your heating process or application.

Anderson-Bolds
Since 1934
216-360-9800
www.anderson-bolds.com




Sunday, August 21, 2016

Carlo Gavazzi Motor Thermistor Relays

Anderson-Bolds can supply Motor Thermistor Relays for Monitoring Motor Temperatures


Carlo Gavazzi is pleased to announce their new DTA7 Series of Motor Thermistor Relays. They are capable of monitoring the temperature of up to six motors (via thermistors on the internal windings). This type of monitoring and control prevents false alarms, which may cause interruptions in production and expensive machine downtime.

There are also numerous improvements from our prior design, such as universal power supply (which reduces the available part numbers choices by 67%) and a bi-color LED which, through different colors and blinking statuses, provides diagnostics, i.e. Power ON, PTC failure(s), Alarm and the ready to RESET state.

One or two output versions are available to facilitate control of the motor(s), with two output devices having the ability to control other auxiliary devices, such as an alarm indicator lamp, PC or PLC.













The Carlo Gavazzi DTA7 Series are useful in most applications where motors are used, especially where overloads are frequent and may cause motor damage, i.e. pumping stations in water treatment, conveyors in materials handling and chillers in HVAC systems.


Main features of the DTA7 Series include:


35.5 mm Mini DIN housing, with screw terminals

1 SPDT (DTA71) or 2 SPDT relay output (DTA72)

Relay contacts are NEMA B300 rated @ 240 VAC

Output 1 is DE-ENERGIZED on alarm (DTA71/DTA72)

(Optional) Output 2 ENERGIZED on alarm (DTA72)


For pricing use our Carlo Gavazzi Parts Form



216-360-9800
info@anderson-bolds.com



Sunday, July 31, 2016

Carlo Gavazzi IP 69K PD30ET Photo Electric Sensors

Anderson-Bolds Sells the IP69 Stainless Steel Sensors from Carlo Gavazzi

July 2016 – CARLO GAVAZZI is proud to announce the launch of their new series of IP69K stainless steel photoelectric sensors, the PD30ET Series.
The new PD30ET Series complements the already popular PD30 photoelectric sensors, with robust AISI316L stainless steel housings. With an IP69K environmental rating and ECOLAB certification, reliable operation is ensured even in the harshest of environments. The PD30ETprovides outstanding resistance to high-pressure wash-down, aggressive cleaning agents, harsh disinfectants and high temperatures frequently found in the Food & Beverage industry. The PD30ET is also ideal for other harsh environments, including Material Handling, Packaging, Agriculture, and Mobile Equipment.

Main features of the PD30ET Series include:
Industry standard dimensions:
  - Housing: 11 x 21 x 31.5mm
  - Mounting: 25.4mm spacing, (2) M3 holes
AISI 316L stainless steel housing
NO and NC outputs, NPN or PNP versions
10–30VDC power supply
IP67, IP68 and IP69K ratings
cULus, ECOLAB, and CE approved
Top potentiometer set-up
Connections: 4-pin M8 plug or 2m cable
The PD30ET Series includes the following sensing types:
Diffuse reflective:
  - Extremely wide-angled (up to 200mm)
  - Long range (up to 1m)
Background Suppression, Active Pixel Sensor:
  - Visible red light version (up to 200mm)
  - Infrared version (up to 200mm)
Retro-Reflective:
  - Polarized visible red light (up to 6m)
  - Non-polarized infrared (up to 6m)
Through-beam versions (up to 15m)



Anderson-Bolds
216-360-9800
www.anderson-bolds.com