Description
Reviews
| Brand | - |
| Category | Machinery & Equipment / Thermo-hygrometers |
| Origin | - |
| Model Number | CWS21 |
| Communication Protocol | RS485 (Modbus RTU) |
| Mounting Type | DIN Rail (35mm) |
| Sensor Type | Split Insertion Probe |
| Temperature Range | -40°C to +80°C |
| Humidity Range | 0% to 100% RH |
| Accuracy (Temperature) | ±0.5°C @ 25°C |
| Accuracy (Humidity) | ±3% RH @ 25°C |
| Power Supply | DC 12V - 24V |
| Probe Cable Length | 2 Meters (Standard) |
Anonymous
Mar 28, 2026
Rating: 5/5
Seamless integration
Integrated perfectly with our existing BMS system. The response time is quick and the humidity readings stabilize rapidly after installation. Very satisfied with this purchase.
Anonymous
Mar 26, 2026
Rating: 4/5
Good product, fast shipping
Works as described. The terminal blocks are easy to wire. I deducted one star simply because the LED indicator is quite bright at night, but that's a very minor complaint.
Anonymous
Mar 15, 2026
Rating: 5/5
Perfect for industrial control panels
The DIN rail mount is very secure and the split design allows me to place the sensor inside the duct while keeping the electronics in the cabinet. RS485 communication was easy to set up with our PLC.
Anonymous
Mar 15, 2026
Rating: 5/5
Great accuracy for the price
Compared this against a calibrated reference meter and the deviation was negligible. The split insertion type is exactly what we needed for retrofitting old systems without replacing entire units.
Anonymous
Mar 09, 2026
Rating: 4/5
Reliable data, clear documentation
We deployed ten of these units in our warehouse. The readings are consistent across all devices. The only minor issue was that the cable could be a bit longer for some specific installations, but overall great value.
Anonymous
Mar 05, 2026
Rating: 5/5
Excellent build quality
Solid construction and the housing feels durable. Setup via Modbus was straightforward using the provided register map. Highly recommended for HVAC monitoring applications.
Q: What is the operating temperature range for the main electronics module?
A: While the probe can handle -40°C to +80°C, the main DIN rail module is rated for -20°C to +60°C to ensure component longevity.
Q: Do you provide a configuration software tool?
A: No proprietary software is required. You can configure address and baud rate using any standard Modbus master tool or via hardware DIP switches if applicable to your specific batch.
Q: Can the probe cable be extended beyond 2 meters?
A: Yes, the probe cable can typically be extended up to 10 meters using shielded cable, though we recommend consulting the manual for signal integrity best practices.
Q: Does this sensor support Modbus TCP or only RTU?
A: This model (CWS21) supports Modbus RTU over RS485 only. It does not have built-in Ethernet for Modbus TCP.
Q: Is calibration certificate included with the unit?
A: Standard units come with a factory test report. An accredited ISO calibration certificate is available as an optional add-on during checkout.
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