Schneider Electric STC100
- Type: NTC 1.8 kΩ (25 °C), surface
- Measurement range: 0 → +120 °C
- Accuracy: ±0.5 °C
- Mounting + IP: surface (strap-on), IP54
Applications
STC100 measures heating flow / return temperature where no immersion pocket is available. Typical uses: retrofit of older substations running Schneider Rubisafe / Rubinet, DHW recirculation return, pump-outlet temperature. When higher accuracy is required — switch to STP120-7 (immersion, with pocket). Delivery across the EU.
Technical specifications
| Parameter | Value |
|---|---|
| Code | 5123202010 |
| Model | Schneider STC100 |
| Sensor type | NTC thermistor, 1.8 kΩ (25 °C) |
| Mounting | Surface, strapped onto pipe (metal or plastic band) |
| Measurement range | 0 → +120 °C |
| Accuracy | ±0.5 °C |
| Time constant | ≈ 30 s (contact under insulation) |
| Wiring | Terminals in housing, 2-wire unshielded run up to 100 m |
| Protection class | IP54 |
| Housing | Plastic housing, aluminium contact plate |
| Compatibility | Schneider Rubisafe, Rubinet, TAC Xenta 100/300 and other NTC 1.8 kΩ controllers |
Designer note
Surface measurement runs 1–3 °C below true water temperature because of contact thermal resistance. Improve accuracy with: (1) tight metal-to-metal contact, (2) a layer of heat-transfer paste, (3) insulation (mineral wool) covering the sensor so ambient air does not cool it. If tighter tolerances are needed, switch to STP120-7 in a pocket.
When to choose STC100
- Heating flow / return temperature measurement without a pocket
- DHW recirculation return
- Retrofit projects with Schneider Rubisafe controllers
- Secondary redundant measurement
- Compatibility: Schneider Rubisafe, Rubinet, TAC Xenta 100/300. Not compatible with Ouman (NTC 10 kΩ) or Danfoss ECL (PT1000).
B2B delivery and logistics
- Delivery across the EU (from warehouse in Vilnius, LT)
- Competitive B2B pricing for projects and bulk orders
- 30-day payment terms for companies (per contract)
- Free technical consultation on sensor compatibility
Manufacturer: se.com (formerly TAC AB)
FAQ
Accuracy loss vs. STP120-7 (immersion)?
STC100 reads 1–3 °C below true water temperature. STP120-7 in a pocket reads ±0.5 °C directly. Choose based on required accuracy.
Can it run without insulation?
Technically yes, but error grows to 5–10 °C or more. Always cover with pipe insulation.
What resistance at 60 °C?
An NTC 1.8 kΩ element reads ~0.5 kΩ at 60 °C. Rule of thumb: doubling of temperature roughly halves the resistance.
Suitable for boiler hot-water measurement?
The 0–120 °C range covers standard heating boilers and boiler-room outlet lines. Higher-temperature applications (steam > 120 °C) require PT1000 or PT100 sensors.
