Watlow thermocouple products

Resistant to harsh environments: MgO insulation is moisture-proof, heat-resistant, and corrosion-resistant, suitable for high voltage (such as steam environment) and vibration (such as engine) scenarios.

3. Typical models and applications

Model series, structural characteristics, key parameters, applicable scenarios

Style AB (stripping type) without terminals, the end of the sheath is stripped to expose the thermocouple wire, and the wiring can be customized. The diameter of the sheath is 0.02-0.25 inches, and the calibration type is J/K/T/E. The temperature range is -200 to 1260 ° C. The device is internally integrated with a customized temperature measurement module

Style AC (plug type) with standard/miniature male and female plugs, plug and play sheath diameter 0.032-0.125 inches, plug temperature resistance 200-425 ° C, temperature range -200 to 1260 ° C Laboratory equipment, portable temperature measurement

Style AR (connector type) with cast iron/aluminum/explosion-proof connector, suitable for high temperature furnace wall connector, temperature resistance of 120-200 ° C, sheath material optional Alloy 600, temperature range of 0 to 1480 ° C (R type) for high temperature industrial furnaces and heat treatment kilns

Style AT (sleeve adaptation type) long sheath design, compatible with thermocouple sleeves, corrosion-resistant sheath length 1-99 inches, spring-loaded to ensure fit with the bottom of the sleeve, temperature range -200 to 1260 ° C for chemical reaction vessels and high-pressure vessels

4. Key points for installation and maintenance

Shear bending: The minimum bending radius depends on the diameter, with a minimum radius of 0.063 inches and a shear radius of 3/16 inches to avoid excessive bending that may cause MgO insulation to fracture.

Wiring: High temperature wires (such as fiberglass insulation) should be used to avoid temperatures exceeding the tolerance value at the terminals (such as micro plugs that can withstand temperatures up to 200 ° C).

Calibration: It is recommended to calibrate once a year, and high-temperature models (such as R/S/B models) need to be calibrated using a precision high-temperature furnace.

（3） Special function thermocouple

1. EXACTSENSE ®  Series (engine after treatment specific)

Core positioning: Suitable for diesel engine DPF (particulate filter), DOC (oxidation catalyst), SCR (selective catalytic reduction) systems, integrating electronic components to achieve signal conversion.

Key features:

Signal output: Supports 0-5V analog signals (RAVS/AVS), LIN 2.1/CAN J1939 digital signals, and is directly compatible with the engine ECM (control module).

Temperature measurement performance: Temperature range -40 to 1100 ° C (Haynes) ®  230 sheath）， Accuracy ± 7 ° C - ± 12.5 ° C, immersion depth 25-200mm.

Environmental adaptation: Anti electromagnetic interference (100V/m 20MHz-2GHz), electronic components can withstand temperatures ranging from -40 to 120 ° C, and sheath can withstand temperatures ranging from -40 to 1100 ° C.

Typical applications: Exhaust gas temperature measurement for heavy-duty trucks, construction machinery, and marine diesel engines, optimizing regeneration efficiency and emission control.

2. MICROCOIL ™  Series (Precision Surface Temperature Measurement)

Core positioning: Precise temperature measurement for small spaces and uneven surfaces, such as chip casings, heat sinks, and micro molds.

Structural innovation:

Spiral design: 0.125-inch diameter spiral coil, spring loaded (12.5oz pressure) to ensure surface adhesion, forming an isothermal temperature measurement area to avoid local temperature difference errors.

Insulation options: Copper tip (temperature resistance of 350 ° C), Aluminum nitride tip (temperature resistance of 700 ° C), suitable for different temperature requirements.

Key parameters: Calibration type K, sheath material Alloy 718, temperature range -40 to 700 ° C, repeatability accuracy ± 1% -2%, response time<0.5 seconds.

3. TR series (RF compatible)

Core positioning: Strong electromagnetic interference scenarios such as plasma generation and radio frequency heating, such as semiconductor plasma etching machines and radio frequency heating furnaces.

Anti interference design:

High insulation: dielectric strength of 3000VDC to avoid capacitive coupling interference.

Wire design: twisted pair cable+shielding layer, improving common mode rejection ratio (CMRR) and reducing EMI induced errors.

Tip material: Silver plated copper (temperature resistant to 260 ° C), aluminum nitride (temperature resistant to 500 ° C), high thermal conductivity ensures response speed.

Key parameters: Calibration type K, thread specification 5/16-18 UNC or M8, temperature range 260-500 ° C, immersion depth 0.875-1.5 inches.

4. Multi point temperature measurement type (gradient temperature measurement)

Core positioning: Scenarios that require simultaneous monitoring of temperature gradients in multiple locations, such as petroleum distillation towers, furnaces, and large storage tanks.

Structural design:

Single sheath multiple measuring points: 2 to multiple thermocouples (mineral insulated type) are integrated into one protective tube, and the distance between measuring points can be customized (minimum 1 inch).