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| Contact Sensors Guide |
Watlow contact temperature sensors come in a variety of types and constructions.
Types include: |
- Thermocouples; in ASTME 230 and non-ASTM Types, available in standard and special tolerances
- Platinum wire wound RTDs; available in DIN temperature coefficients
- Thermistors; negative temperature coefficient in a variety of base resistances. Positive coefficient thermistors are available on made-to-order units.
Constructions cover the wide variety of packages available to meet specific application needs. |
| Tube & Wire
Good, general purpose thermocouple available in a wide variety of constructions and mounting methods. Over 5,000,000 stock variations available for next day shipment. Fiberglass insulated Type E, J, K and T thermocouples capable of temperatures up to 900°F (480°C). Available as a probe, washer, pipe clamp, shim, melt bolt and grommet sensor. Mounting methods include bayonet, flange, nozzle, magnetic and peel-and-stick. Probes come in straight, forty five and ninety degree bend constructions in both SAE and metric sizes.
Applications
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Plastic injection molding machinery
Food processing equipment
Deicing
Plating baths
Industrial processing
Medical equipment |
Pipe tracing control
Packaging equipment
Industrial heat treating
Liquid temperature measurement
Refrigeration equipment
Oven temperature control |
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| Mineral Insulated
Mineral insulated thermocouples are fast responding and durable, capable of temperatures up to 1200°C (2200°F). Available in a variety of sheath materials and diameters to meet environment and response time needs. Exposed, grounded and ungrounded junctions meet response and electrical isolation requirements. ASTME 230 available in calibration Types E, J, K, N, R, S and T with a variety of sheath materials for environmental protection. Terminations include a variety of standard and mini plugs and jacks, connection heads and more. Mountings include fittings, bayonets and thermowells as well as weld pads on select styles.
Applications
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Heat treating
Furnace/kilns
Turbines
Bearing temperature
Power stations
Steam generators
Diesel engines
Nuclear reactors
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Atomic research
Jet engines and test cells
Rocket engines
Semiconductor manufacturing
Refineries/oil processing
Catalytic reformers
Food processing |
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| Special Applications
Capable of temperatures up to 2315°C (4200°F). Available in Types B, C, R and S with a wide selection of sheath and insulation materials to meet specific application conditions. Probe style construction offers application flexibility. Unique multi-point thermocouple permits a single sensor assembly to measure thermal gradients. True surface thermocouple offer superior accuracy for measuring flat surface temperatures.
Applications
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Turbines
Power stations and steam generators
Laboratory research
Diesel and jet engines
Nuclear environments
Storage tanks
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Semiconductor manufacturing
Rocket engines
Turbines
Vacuum furnaces
Exhaust gas sensing |
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| Base Metal
Well suited for metal processing, chemical and storage tank temperature measurement. Type J and K calibrations are capable of temperatures up to 1260°C (2300°F). Constructions include insulated wire, bare and ceramic insulated elements. Thermocouples with protection include straight and angle types with connection heads and a variety of materials to meet application needs.
Applications
Metal processing such as aluminum, zinc, brass (with appropriate protection tube)
Chemical and petrochemical processing
Industrial storage tanks
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| Noble Metal
Platinum alloy thermocouples Types B, R and S are capable of temperatures up to 1700°C (3100°F). Available as bare elements, elements with insulators or assemblies. A typical assembly includes a head, alumina insulators and a protecting tube.
Applications
Heat treating and control sensors
Semiconductor
Class manufacturing
Ferrous and non-ferrous metals
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| RTDs
Platinum resistance elements ensure precise and repeatable temperature measurement and deliver interchangeability without recalibration. A wide temperature range of -200 to 650°C (-328 to 1200°F) makes RTDs suitable for many applications. Single element with, 2-, 3- and 4-wire constructions address leadwire resistance considerations. Available in a wide variety of probes including thermowell and optional connection head constructions. Versatile mounting methods extend application flexibility.
Applications
Air conditioning and refrigeration servicing
Furnace servicing
Stoves and grills
Textile production
Plastics processing |
Petrochemical processing
Exhaust gas temperature measurement
Air, gas and liquid temperature measurement
Micro electronics |
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| Thermistors
Available in negative temperature coefficients, with temperature ranges from -80 to 300°C (-112 to 570°F) in a range of base resistances. Constructions include probe, open air, cartridge, surface mount, bayonet and more.
Applications
HVAC servicing
Textile production
Plastics processing
Petrochemical processing
Air, gas and liquid temperature measurement
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Application Assistance
For application assistance specific to your temperature measurement need, please contact your nearest Watlow sales office.
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Hytrel® is a registered trademark of E.I. du Pont de Nemours & Company.
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