QBM65 series differential pressure sensors are used to capture pressure differences of air or inert gases. The models are available with either linear pressure characteristics or a root extraction feature with adjustable pressure measurement ranges.
The QBM65 series differential pressure sensors are designed for HVAC, industrial, and medical applications, offering linear or root‑removal pressure characteristics with selectable measurement ranges. The sensors output a DC 0‑10 V signal and operate from AC 24 V ±15 % or DC 13.5‑33 V.
The manual covers mechanical design, recommended vertical installation, wiring connections, factory calibration procedures, and technical data such as accuracy, response time, IP rating, and environmental limits. Accessories like pipe probes and mounting brackets are also described. This manual is written in Chinese.
| Working voltage | AC 24 V ±15 % or DC 13.5‑33 V |
|---|---|
| Output voltage | DC 0‑10 V |
| Measurement range (example model) | -50 Pa to +50 Pa (QBM65-10U) |
| Zero‑point error | < +0.7 % FS |
| Response time | < 10 ms |
| Weight (no display) | 0.09 kg |
The sensor provides a DC 0‑10 V output signal.
The sensor should be installed vertically; horizontal installation is not recommended because it can cause measurement errors.
It can be powered from AC 24 V ±15 % or DC 13.5‑33 V.