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Watlow
Watlow AF Style MI Thermocouple with Metal Transition
Quote on request
No online payment · add lines to RFQ BOM
MI Style AF; metal transition + spring strain relief; to ~1200 °C. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Approvals
RoHS (typical sensor constructions)
Mounting
Compression fittings / weld pads / flanges ordered separately as needed
Style
AF — mineral-insulated thermocouple with metal transition and spring strain relief to flexible lead
Temperature
Depends on calibration/sheath; MI constructions commonly to about 1200 °C (2200 °F) type/sheath dependent
Insulation
Compacted MgO mineral insulation (XACTPAK sheath)
Calibration
Type J, K and other ANSI/IEC calibrations per ordering
Fits MI sensing with flexible leads where you need a Watlow Style AF mineral-insulated thermocouple with a metal transition and coiled spring strain relief to SERV-RITE lead wire.
Key advantages
- Style — AF MI with metal transition and spring strain relief
- Temperature — Commonly to about 1200 °C (2200 °F), type/sheath dependent
- Transition — Metal transition crimped to sheath ≥0.040 in with coiled spring
- Leads — Flexible SERV-RITE insulated lead (e.g. FEP) from transition
- Sheath — Typical from ~0.040 in upward; rapid-ship examples 0.063–0.250 in
Typical applications
- Process/OEM equipment needing flexible leads.
- Compact MI sheaths with flex relief.
- Sites specifying Style AF transitions.
Selection guide
- Calibration / junction — J/K/etc.
- OD / length — Sheath ≥0.040 in for metal transition
- Lead insulation / length — SERV-RITE options
- Mounting — Compression fittings / weld pads ordered separately
Common mistakes
- Ordering AF transition on sheath below 0.040 in.
- Ignoring spring strain-relief orientation at flex point.
- Wrong calibration for process temperature.
When to RFQ / what to tell us
- Type, OD, length, junction.
- Lead type/length; quantity; ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 22855 |
| Brand | Watlow |
| Model | AF Style MI Thermocouple with Metal Transitions |
| Product type | Thermocouple |
| Style | AF — mineral-insulated thermocouple with metal transition and spring strain relief to flexible lead |
| Temperature | Depends on calibration/sheath; MI constructions commonly to about 1200 °C (2200 °F) type/sheath dependent |
| Insulation | Compacted MgO mineral insulation (XACTPAK sheath) |
| Calibration | Type J, K and other ANSI/IEC calibrations per ordering |
| Sheath | Typical diameters from about 0.040 in (1 mm) upward; rapid-ship examples 0.063–0.250 in |
| Transition | Metal transition crimped to sheath ≥0.040 in with coiled spring strain relief |
| Lead wire | Flexible SERV-RITE insulated lead (e.g. FEP) from transition |
| Junction | Grounded, ungrounded, or exposed junction options |
| Sheath materials | SS and high-temperature alloys per Watlow MI offering |
| Mounting | Compression fittings / weld pads / flanges ordered separately as needed |
| Applications | Process and OEM equipment where flexible leads and compact MI sheaths are required |
| Features | Style AF metal transition with spring strain relief; configurable sheath OD/length/calibration |
Documents
FAQ
Q: What is Style AF? A: MI thermocouple with metal transition and spring strain relief to flexible leads.
Q: Min sheath for transition? A: Metal transition typically for sheath ≥0.040 in.
Q: What should I send for a quote? A: Type/OD/length/leads, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Approvals | RoHS (typical sensor constructions) |
| Mounting | Compression fittings / weld pads / flanges ordered separately as needed |
| Style | AF — mineral-insulated thermocouple with metal transition and spring strain relief to flexible lead |
| Temperature | Depends on calibration/sheath; MI constructions commonly to about 1200 °C (2200 °F) type/sheath dependent |
| Insulation | Compacted MgO mineral insulation (XACTPAK sheath) |
| Calibration | Type J, K and other ANSI/IEC calibrations per ordering |
| Sheath | Typical diameters from about 0.040 in (1 mm) upward; rapid-ship examples 0.063–0.250 in |
| Transition | Metal transition crimped to sheath ≥0.040 in with coiled spring strain relief |
| Lead Wire | Flexible SERV-RITE insulated lead (e.g. FEP) from transition |
| Junction | Grounded, ungrounded, or exposed junction options |
| Sheath Materials | SS and high-temperature alloys per Watlow MI offering |
| Protection | Spring strain relief at metal transition reduces flex fatigue |
| Applications | Process and OEM equipment where flexible leads and compact MI sheaths are required |
| Special Features | Style AF metal transition with spring strain relief; configurable sheath OD/length/calibration |