Belimo 01ST-1B3 - passive contact temperature sensor

Belimo 01ST-1B3 – contact temperature sensor

Passive sensor for measuring temperature on pipes and curved surfaces. The 01ST-1B3 version has a Pt1000 output signal and a 2 m, 2-wire cable.

Key technical data

• Measured value: temperature; medium: water.
• Passive temperature sensor output signal: Pt1000.
• Measuring range: -35...100°C [-30...210°F].
• Probe diameter: 6 mm.
• Electrical connection: 2 m, 2-wire cable.
• Measuring current for Pt1000: <0.3 mA @ 0°C [32°F].
• Accuracy for Pt..: Class B, ±0.3°C @ 0°C [±0.5°F @ 32°F].
• Time constant τ (63%) on a water pipe: typically 17 s when using heat transfer paste.
• IEC/EN protection rating: IP65.
• Included: fastening strap for pipes ø20...110 mm [0.8...4.3"].

In a passive 2-wire sensor, the supply current affects measurement accuracy due to self-heating; it must not exceed the specified measuring current. For long connection cables, account for cable resistance.