Catalogue - Sensor catalog - Watlow - (Version JPG)

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RTD, Temperature sensor, Coil heater, Temperature limiter, Cartridge heater

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General Information

Lab Services

Quality Certification Lab

Continued

Certification Testing


Service	Description	Specifications

End-to-End Calibration	Comparison of each end of a length of thermocouple wire by utilizing a common junction measurement test. This is a requirement to verify homogeneity requirements.	ASTM E 207, E 220, E 230
Dielectric Testing	Performance levels of wire insulations in the presence of high, local fields caused by electrical discharges. Routinely used in Watlow quality control testing.	ASTM D 149
Helium Leak Test	Verifies the sheath integrity in metal-sheathed cable and sensors to 70 kg/cm² (1000 psi) in specially designed pressure chambers.	ASTM E 235
Radiographic Inspection	Determines dimensions, and detects and evaluates cracks, voids, inclusions and discontinuities. Technicians qualified under SNT-TC-1A.	ASTM E 94, E 142,
Metallographic Examination	Reveals the constituents and structures of metals. Photomicrographs are also available to determine and document average grain size and structure of prepared specimens.	ASTM E 3, E 112, E 235
Compaction Density Test	Determines the compaction of insulating materials in metal-sheathed cable.	ASTM D 2771
Drift Test	Determines long-term stability and drift characteristics.	ASTM E 601, E 644
Thermal Cycle Test	Individual sensors subjected to repeated cycling through a temperature range.	ASTM E 235
Insulation Resistance	Measures the electrical insulation resistance properties between the thermoelements and the sheath at ambient as well as elevated temperatures to determine the presence of moisture or impurities which could affect sensor performance.	ASTM E 780, E 235, E 644
Spurious EMF	Determines the homogeneity of the thermoelements. Performed at high temperatures on the entire length of XACTPAK mineral insulated, metal-sheathed cable.	Watlow
Micro-Hardness	Determines the hardness of sheath or conductors used to measure a material's resistance to penetration (hardness) as a predictor of strength, machin-ability, brittleness, ductility and wear resistance.	Vicker's

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X-rays of the sensor verify the nonexistence of cracks at weld points that could let in humidity or gas and potentially shorten the life of the thermocouple.

Sensor catalog - Watlow - #35

RTD, Temperature sensor, Coil heater, Temperature limiter, Cartridge heater