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Watlow
Watlow Rigid Sheath Thermocouple
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Rigid sheath TC J/K/T/E; to 900 °F fiberglass; 1/8–3/16 in. RFQ + selection help.
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Key parameters
Measuring range
Fiberglass-insulated continuous to 900 °F (480 °C); PFA wire typically to 500 °F (260 °C)
Accuracy
Standard ASTM E230 thermocouple tolerances (depends on type and temperature)
Process connection
Optional threaded fittings, fixed bayonet, washers, nozzles, clamp bands
Wetted parts
Stainless steel sheaths; optional PFA-coated sheath (0.010 in wall) for corrosive service
Ambient temperature
Depends on lead insulation (fiberglass to 480 °C continuous capability at hot end)
Approvals
ASTM E230
Fits general-purpose immersion temperature sensing where you need a Watlow rigid sheath thermocouple (Styles 21/22/31/41/42) with J/K/T/E calibrations and fiberglass leads to 900 °F (480 °C).
Key advantages
- Types — J, K, T, E; grounded, ungrounded, or exposed junctions
- Temperature — Fiberglass to 900 °F (480 °C); PFA typically to 500 °F (260 °C)
- Sheath — 1/8 and 3/16 in; straight, 45°, or 90° bend
- Leads — SERV-RITE fiberglass or high-temp resin; SS braid/armor optional; 6–360 in
- Options — Threaded fittings, bayonet, washers, nozzles, clamp bands; epoxy-sealed cold ends
Typical applications
- Food processing and plating baths.
- Ovens, pipe tracing, medical equipment.
- Industrial heat treating.
Selection guide
- Calibration / junction — J/K/T/E and grounded vs ungrounded
- OD / bend — 1/8 vs 3/16 in; straight/45°/90°
- Lead insulation — Fiberglass vs PFA vs braid
- Fittings — Process mount options
Common mistakes
- Using PFA leads above ~500 °F.
- Wrong junction type for noise/response needs.
- Ignoring ASTM E230 color coding on replacements.
When to RFQ / what to tell us
- Type/junction, OD, bend, lead length/insulation.
- Fittings; quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 22584 |
| Brand | Watlow |
| Model | Rigid Sheath Thermocouple |
| Product type | Thermocouple |
| Measuring range | Fiberglass-insulated continuous to 900 °F (480 °C); PFA wire typically to 500 °F (260 °C) |
| Sensor type | Thermocouple types J, K, T, E; grounded, ungrounded, or exposed junctions |
| Sheath | Rigid sheath styles 21/22/31/41/42; 1/8 and 3/16 in diameters; straight, 45°, or 90° bend |
| Accuracy | Standard ASTM E230 thermocouple tolerances (depends on type and temperature) |
| Process connection | Optional threaded fittings, fixed bayonet, washers, nozzles, clamp bands |
| Wetted materials | Stainless steel sheaths; optional PFA-coated sheath (0.010 in wall) for corrosive service |
| Lead wire | SERV-RITE fiberglass or high-temp resin insulation; SS braid or flexible armor optional; leads 6–360 in |
| Cold end | Epoxy-sealed cold ends available for moisture/fume resistance |
| Features | 32 standard sheath lengths; flat/drill points; adjustable depths; ASTM E230 color coding |
| Approvals | ASTM E230 |
| Applications | Food processing, plating baths, ovens, pipe tracing, medical equipment, industrial heat treating |
Documents
FAQ
Q: Max temperature? A: Fiberglass constructions continuous to 900 °F (480 °C).
Q: Diameters? A: 1/8 and 3/16 in rigid sheath styles.
Q: What should I send for a quote? A: Type/OD/bend/leads, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Fiberglass-insulated continuous to 900 °F (480 °C); PFA wire typically to 500 °F (260 °C) |
| Accuracy | Standard ASTM E230 thermocouple tolerances (depends on type and temperature) |
| Process connection | Optional threaded fittings, fixed bayonet, washers, nozzles, clamp bands |
| Wetted parts | Stainless steel sheaths; optional PFA-coated sheath (0.010 in wall) for corrosive service |
| Ambient temperature | Depends on lead insulation (fiberglass to 480 °C continuous capability at hot end) |
| Approvals | ASTM E230 |
| Sensor type | Thermocouple types J, K, T, E; grounded, ungrounded, or exposed junctions |
| Sheath | Rigid sheath styles 21/22/31/41/42; 1/8 and 3/16 in diameters; straight, 45°, or 90° bend |
| Lead Wire | SERV-RITE fiberglass or high-temp resin insulation; SS braid or flexible armor optional; leads 6–360 in |
| Cold End | Epoxy-sealed cold ends available for moisture/fume resistance |
| Special Features | 32 standard sheath lengths; flat/drill points; adjustable depths; ASTM E230 color coding |
| Applications | Food processing, plating baths, ovens, pipe tracing, medical equipment, industrial heat treating |