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United Electric Controls has more than 80 years of proven experience providing rugged pressure and temperature electromechanical and electronic switches to Chemical & Petrochemical, Power, Water & Wastewater and Oil & Gas industries, as well as many other challenging OEM applications.
UE pressure switches, pressure transducers and pressure transmitters, temperature switches and temperature sensors are designed for rugged, industrial environments.
United Electric Controls has more than 150 distributors worldwide. Please visit our distributor locator page to find a distributor near you.
Three Manufacturing Divisions
Lean manufacturing for maximum productivity
Operational excellence (OpX) reduces waste
One-piece-flow for optimum manufacturing efficiency
Technical Sales: 617.923.6977
United Electric Controls Company
180 Dexter Ave
Watertown, MA 02472-4200
We actively use feedback to improve our delivery and provide you with the best possible service.
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Temperature Sensor manufacturer, United Electric Controls, is a major manufacturer of industrial temperature sensors, thermocouples, resistance temperature sensors (RTD's), thermistor and other types of sensor assemblies. ISO 9001 certified and a leading practitioner of Lean Manufacturing methods, we focus on building high-quality, high-reliability products for the industrial market. Our expertise covers a wide variety of applications, from lab equipment to road-making equipment, from the blast furnace to the blast chiller, and everything in between.
We Design, Engineer and Manufacture:
All of our products are known for their consistent high reliability, cost effectiveness and durability. We are continually examining and improving our engineering, production and service operations to meet constantly changing customer requirements. Our ISO 9001 certification is objective proof of our company wide commitment to quality.
We have a talented group of Temperature Sensor experts at our Headquarters in Watertown, MA. This group, Applied Sensor Technologies, was formed specifically to serve our wide spectrum of customers. They are experienced and dedicated to producing the best temperature sensors for a wide variety of applications. Please email or call us with any questions or, visit our Temperature Sensor Website.
Our customers purchase both custom designed and standard catalog products. We excel in supplying today's manufacturers with temperature sensors that meet their needs. We can help you develop, and then manufacture the sensor that works with your product. United Electric brings many strengths to the OEM customer, including:
We manufacture temperature sensors for many different types of customers' applications. Some of our customers use our Temperature Sensors in:
Thermocouples can measure temperatures over wide ranges, inexpensively.
They are very rugged, but they are not as accurate as RTDs and thermistors.
A thermocouple is basically two strips of wires of dissimilar metals. These metal
wires are joined at one end and the voltage is measured at the other end. Changes
in the temperature at the juncture induce a change in electromotive force (emf) at
the other end. As the temperature goes up, this output emf of the thermocouple rises,
though not necessarily linearly.
Visit our Thermocouple page to learn more.
Self Powered Non Linear
Simple Low Voltage
Rugged Reference Required
Inexpensive Least Stable
Wide Variety Least Sensitive
Wide Temperature Range
RTD's are stable and have a fairly wide temperature range, but are not as
rugged and inexpensive as thermocouples. Since they require the use of
electric current to make measurements, RTD's are subject to inaccuracies
An RTD capitalizes on the fact that the electrical resistance of a material
changes as its temperature changes. RTD's rely on the resistance change
in a metal. The resistance will rise more or less linearly with temperature.
Traditionally, RTD's use a length of conductor (platinum, nickel iron or
copper) wound around an insulator. Newer styles use a thin film of the
conductor deposited on a ceramic substrate.
RTD's are used to measure temperatures from -196° to 482° C (-320° to 900° F).
Visit our RTD page to learn more.
Most Stable Expensive
Most Accurate Current Source Required
More Linear than Thermocouple Small delta R
Low Absolute resistance
Less Rugged than Thermocouples
Below is a summary of some of the advantages and disadvantages of thermocouples
Which Sensor Should I Use?
When choosing which temperature sensor to use there are many things to consider. One very important decision is selecting the type of sensor that best fits your requirement. Below is a description of the types of Temperature Sensors that United Electric Controls Co. designs, engineers and manufactures. Each technology has advantages and limitations.
Below is a summary of some of the advantages and disadvantages of RTD's
Standard Catalog Products
Sensor Sheath Materials
Temperature Sensor Styles
Temperature Sensors at UE are built in a broad spectrum of styles. They are:
Leadwire - Standard thermocouples with fiberglass, Teflon® or PVC insulation available with a variety of protective coverings including Teflon® sleeves.
Terminal Heads -Configurations including Enclosure Type 4 and 7 heads; with or without NUN (nipple-union-nipple) connections.
Process Mount - Double and single sided process mount styles and single sided instrument mounts.
Plugs - Standard and mini male plugs with and without leadwires.
Surface Mount - A variety of mounting options including washer styles, mounting lugs and weld pads; with fiberglass or Teflon® insulation.
The Sensor Box™ provides the Process customer with an alternative to expediting, emergency orders and large amounts of “dead” inventory. A modular system of sensors, hardware and tools, the Sensor Box™ is used by the maintenance professional to build a variety of temperature sensor assemblies on-site, in minutes. Among the benefits that customers report are:
Improved Process Up-time
Greatly Reduces Expediting, Emergency Orders and Premium Charges
Fewer Emergency Orders
Lower, More Flexible Inventory
The Sensor Box™ can be customized in many ways to meet your specific needs.
You Have A Problem... 3:00 PM on a Friday afternoon, and you’ve just discovered a temperaturesensor has failed in an important process. The Safety Engineer wantsthe process shut down, but you’re under pressure to keep productionmoving. You’re going to spend the rest of the afternoon in “Panic Mode,”calling every sensor supplier you can think of, begging for the bestdelivery at a premium. Not very pretty. If this sounds familiar, then the SENSOR BOX™ was developed tohelp improve your life. Maintenance or instrument technicians cannow build a new temperature sensor assembly, install it and theplant can be back up and running in minutes rather than days!The SENSOR BOX™ is designed for any plant where temperaturesensors are an important part of the operation, and downtime is notan option.
Standard Catalog Products
United Electric Controls has a broad selection of Standard Catalog Temperature Sensors that are designed for general industrial use. These are available for a variety of uses and come in many standard configurations. These standard products are available from our worldwide network of distributors or directly from our factory in Watertown, MA.
United Electric Controls has General Purpose and Mineral Insulated thermocouples, wire wound and thin film RTDs as well as thermistors for all standard applications. In our catalog we offer a wide variety of styles of temperature sensors using these different sensing elements.
Temperature Sensor Sheath Materials
Sheath Material Description Applications Temperature Range
304 Stainless steel
UE Non Standard Material
316 Stainless steel
316 (L) UE Standard Material
Inconel ® 600 UE Non Standard Material
A very good all purpose stainless steel of moderate cost.
The best corrosion resistance of the Stainless steels. Good resistance to sulfur or chlorine bearing liquids.
This alloy is more expensive than SS but has higher corrosion resistance and better temperature tolerance.
Up to 875 degrees C (1,600 degrees F) for cyclical applications
Up to 900 degrees C (1650 degrees F)
Up to 1,175 degrees C (2,150 degrees F)
Applied Sensor Technologies, a division of United Electric Controls, is a major manufacturer of thermocouple, RTD, thermistor and other temperature sensor assemblies. ISO 9001:2000 certified and a leading practitioner of JIT and Lean Manufacturing methods, Applied Sensor Technologies has expertise in a wide variety of process applications, from the blast furnace to the blast freezer; from chemical processing to food processing. Please visit our website: www.appliedsensortech.com, or give us a call at 617-923-6966!
Thermistors tend to be more accurate than RTD's and thermocouples, but
they have a much more limited temperature range because of their marked
A Thermistor capitalizes on the fact that the electrical resistance of a material
changes as its temperature changes. Thermistors rely on the resistance change in a ceramic semiconductor, with the resistance dropping non-linearly with a temperature rise.
Thermistors can be a low cost solution to temperature measurement. They
tend to have large signal outputs and their small size permits fast response
to temperature changes. UE Thermistors are used to measure temperatures
from -45° to 260° C (-50° to 500° F).
Below is a summary of some of the advantages and disadvantages of Thermistors
High Output Non Linear
Fast Limited Temperature Range
Two-wire ohms measurement Fragile
Current Source Required
The newest type of temperature sensor on the market is the integrated
circuit (IC) temperature transducer. IC sensors can be designed to produce
either voltage or current output and are extremely linear.
IC sensors are a very effective way to produce an analog voltage proportional
to temperature. They have a limited temperature range and are used to measure temperatures from -45° to 150° C (-50° to 300° F).
Below is a summary of some of the advantages and disadvantages of IC Sensors.
Temperatures limited to 150 degrees C
Power Supply Required
We offer accessories to accompany our temperature sensors.
• Thermocouple Wire
• RTD Wire
• Temperature Sensor Heads and terminal blocks
• Extension lead wire assemblies
• Plugs and other terminations
• Compression fittings
Visit our Accessories page for more information.
When you choose a Heat Trace RTD you simplify installation and reduce maintenance expenses. They are designed for use in any pipe or surface temperature measuring applications; these sensors have been specifically designed for use with electronic heat control products.
Heat Trace products have:
• Heat Transfer pad with excellent temperature response
• Rugged stainless steel sheath provides excellent mechanical protection
• Replaceable element design simplifies RTD replacement.
• To replace a faulty element, you simply remove the head cover, disconnect the leads and remove the element. You then insert the new
element and reconnect the leads. Your process is up and running in minutes.
Heat Trace Thermocouple
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180 Dexter Avenue, Watertown, MA 02472-4200
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