The Belimo P-01RT-5Q-0 is a passive room temperature sensor with a setpoint adjustment potentiometer. It pairs a NTC 20,000 Ohm thermistor sensing element with a 0...10 kOhm potentiometer dial and a manual override button. Occupants can nudge the room setpoint up or down, while the BAS reads both the temperature resistance and the dial position as separate inputs. White (RAL 9003) housing mounts to a single-gang box or directly to drywall.
Key Features
0...10 kOhm Setpoint Potentiometer
Front-mounted dial provides a 0...10 kOhm resistance signal proportional to position. Map it to the controller's setpoint logic for occupant-adjustable comfort. Typical accuracy ±12%.
20K Thermistor (NTC20k) Temperature Element
NTC 20,000 Ohm thermistor delivers ±0.2°C @ 25°C [±0.35°F @ 77°F] accuracy across the 0-50°C [32-122°F] room range — wire directly to any DDC controller accepting this resistance curve.
Manual Override Button
Front button briefly shorts the thermistor, signaling the controller to enter an override sequence — common uses include after-hours occupancy and warm-up calls.
Sleek Wall-Mount Design
PC housing in white RAL 9003 with discrete styling for occupied spaces. Spring-loaded terminals accept 0.5-1.5 mm² conductors. Cable entry on back (in-wall) or top/bottom (surface).
Technical Specifications
| Specification | |
|---|---|
| Sensor Element | NTC 20,000 Ohm thermistor |
| Output Signal | Passive (2-wire resistance) |
| Setpoint Potentiometer | 0...10 kOhm |
| Potentiometer Accuracy | Typical ±12% |
| Measuring Range | 32...122°F [0...50°C] |
| Temperature Accuracy | ±0.2°C @ 25°C [±0.35°F @ 77°F] |
| Time Constant (63%) | Typical 360 s in still air |
| Wall Coupling Factor | 35% |
| Manual Override | Front-panel push button (shorts the thermistor) |
| Electrical Connection | Spring-loaded terminal 0.5...1.5 mm² |
| Cable Entry | Back, top, and bottom side |
| Housing | PC, white, RAL 9003 |
| Protection | IP30 / NEMA 1 |
| Ambient Temperature | 32...122°F [0...50°C] |
| Ambient Humidity | Max. 95% RH, non-condensing |
| Certifications | IEC/EN 60730-1, IEC/EN 60730-2-9, CE, ISO 9001 |
| Warranty | 5 Years |
Documentation
Frequently Asked Questions
What does the setpoint dial on the P-01RT-5Q-0 actually output?
A passive resistance signal of 0...10 kOhm, proportional to dial position. The controller reads it as a separate input — the temperature element output is independent. Typical potentiometer accuracy is ±12%.
Do I need a powered controller input for the setpoint?
No, the setpoint is purely passive — the controller measures the resistance across two of the terminals just like a passive temperature input. No 24 V supply needed for the sensor.
What is the difference between the 01RT-5 and the P-01RT-5?
The P-01RT-5 series adds a front-mounted setpoint potentiometer. The temperature element (20K Thermistor (NTC20k)) and manual override are otherwise identical. Choose P- when occupants need a setpoint dial; choose 01RT-5 (no P) when the BAS handles all setpoint control.
How accurate is the temperature reading?
The 20K Thermistor (NTC20k) element provides ±0.2°C @ 25°C [±0.35°F @ 77°F]. For long cable runs, account for line resistance — lower-impedance elements (like Pt1000) are more affected by cable resistance than higher-impedance ones (like NTC20k).
Can I disable or lock out the setpoint dial?
Not on the sensor itself — the dial is mechanical. Use the BAS to constrain how far the setpoint can deviate from the schedule. For tamper-resistant rooms, consider the Belimo EXT-RT-SS stainless-steel wall plate, which has no dial.
- Sensor Type:
- Wall Mount
- Temperature Element:
- 20K
- Supported Protocols:
- None
- Humidity Element:
- None
- CO2 Element:
- None
- Setpoint:
- Setpoint
- Override:
- Override
- Display:
- No Display
- Material:
- Plastic
