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Endress+Hauser
Endress+Hauser Thermophant T TTR31 Temperature Switch
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E+H Thermophant TTR31: Pt100 switch; −50…150 °C; PNP / 4–20 mA; 12–30 VDC. RFQ.
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Key parameters
Measuring range
−50 to 150 °C (−58 to 302 °F); −50 to 200 °C with extension neck
Output
1× PNP; 2× PNP; or PNP + active 4–20 mA
Supply
12 to 30 VDC (reverse polarity protection)
Process connection
Industrial: compression fitting (sensor ≥100 mm); G½", G¼", NPT¼", NPT½"
Ambient temperature
−40 to 85 °C (−40 to 185 °F)
Display
Local digital display and LEDs for function control
Fits compact temperature switching where you need an Endress+Hauser Thermophant T TTR31. Pt100 Class A switch spanning −50 to 150 °C (−50 to 200 °C with extension neck), total error ≤0.5 K (−50…75 °C) / ≤0.75 K (75…200 °C), with 1× PNP, 2× PNP or PNP + active 4–20 mA outputs on 12–30 VDC.
Key advantages
- Range — −50 to 150 °C; to 200 °C with neck
- Sensor — Pt100 Class A (IEC 60751)
- Error — ≤0.5 K (−50…75 °C); ≤0.75 K (75…200 °C)
- Outputs — 1×/2× PNP or PNP + 4–20 mA
- Supply — 12 to 30 VDC
Typical applications
- Machine temperature switch.
- Tank / pipe discrete temp.
- OEM compact Thermophant.
Selection guide
- Output wiring
- Connection thread
- Neck for >150 °C
Common mistakes
- Exceeding 150 °C without neck.
- Wrong PNP load.
- Compression fitting on short sensor.
When to RFQ / what to tell us
- Output/connection/length.
- Quantity, ship-to.
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Specs
| Spec | Value |
|---|---|
| SKU | 45978 |
| Brand | Endress+Hauser |
| Model | Thermophant T TTR31 Temperature Switch |
| Product type | Temperature Switch |
| Measuring range | −50 to 150 °C (−58 to 302 °F); −50 to 200 °C with extension neck |
| Sensor | Pt100 RTD, Class A per IEC 60751 |
| Accuracy total error | ≤0.5 K (−50…75 °C); ≤0.75 K (75…200 °C) = electronics 0.2 K + sensor Class A |
| Output signal | 1× PNP; 2× PNP; or PNP + active 4–20 mA |
| Supply voltage | 12 to 30 VDC (reverse polarity protection) |
| Process connection | Industrial: compression fitting (sensor ≥100 mm); G½", G¼", NPT¼", NPT½" |
Documents
FAQ
Q: Sensor? A: Pt100 Class A.
Q: Supply? A: 12–30 VDC.
Q: What should I send for a quote? A: Output/connection/length, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | −50 to 150 °C (−58 to 302 °F); −50 to 200 °C with extension neck |
| Output | 1× PNP; 2× PNP; or PNP + active 4–20 mA |
| Supply | 12 to 30 VDC (reverse polarity protection) |
| Process connection | Industrial: compression fitting (sensor ≥100 mm); G½", G¼", NPT¼", NPT½" |
| Ambient temperature | −40 to 85 °C (−40 to 185 °F) |
| Display | Local digital display and LEDs for function control |
| Approvals | 3-A mark (hygiene family); DESINA-compliant |
| Sensor | Pt100 RTD, Class A per IEC 60751 |
| Accuracy Total Error | ≤0.5 K (−50…75 °C); ≤0.75 K (75…200 °C) = electronics 0.2 K + sensor Class A |
| Degree Of Protection | IP65 (M16/NPT½" valve connector); IP66 (M12×1) |
| Sensor Response Time | t50 < 1.0 s; t90 < 2.0 s (IEC 60751, 0.4 m/s water); switch output 100 ms |
| Long Term Drift | ≤0.1 K per year under reference conditions |
| Switch Point Non Reproducibility | 0.1 K per EN 61298-2 |
| Min Measuring Span | 20 K (36 °F) |