Features
• FM listed
• Stainless steel fittings
• Stainless steel or aluminum lag unions
• TIG welded construction
• Cast aluminum heads
• Inconel or stainless steel sheaths
• Single or dual elements
• Leads per element: 2, 3, or 4

Calibrations
Traceable to NIST
R vs. T table for each RTD (at added cost)

Thermowells & Connection Heads
11 approved configurations
See Data Sheet T-WELLS

Operating Temperature Range
stainless sheath:
–196°C to 480°C (–320°F to 900°F)
Inconel sheath:
–196°C to 649°C (–320°F to 1200°F)
thin films in stainless sheath:
–50°C to 480°C (–60°F to 900°F)
Leadwire exit temperature:
260°C (500°F)

Element Resistance, Ohms
100.0 ± 0.1 @ 0°C (32°F)
100.0 ± 0.12 @ 0°C (32°F) Thin Film
200.0 ± 0.2 @ 0°C (32°F)
500.0 ± 0.6 @ 0°C (32°F) Thin Film
1000.0 ± 1.2 @ 0°C (32°F) Thin Film

Temperature Coefficients
0.003924 Ω/Ω/°C (reference grade)
0.003850 Ω/Ω/°C (IEC/DIN grade)

Accuracy
0.25°C @ 0°C (32°F)
0.3°C @ 0°C (32°F) on
IEC/DIN Thin Films

Stability
Less than 0.05°C shift per year
full span on wire elements,
–50°C to 300°C (–60°F to 575°F)
span on thin films

Response Time of Model 22B
Less than 6 seconds
in water flowing at 3 ft. per second

Vibration
Sinusoidal 20Hz to 2kHz
Wire Element:
25g Standard Construction,
50g Heavy Duty Construction
Thin Film:
80g Standard Construction

Self-Heating
35 milliwatt/°F in water @ 3 ft/sec.

Recommended Current
1mA maximum

Insulation Resistance
500 MegOhms minimum
@ 100VDC @ 25°C (77°F)

Pressure Rating
3000 PSI

Lead Materials
22 AWG nickel-plated stranded copper wire, TFE Teflon® insulated

Teflon® is a registered trademark
of the DuPont Corporation.