Digital Temperature Sensor
A DS18B20-based temperature sensor with Modbus RS485 output, a sealed stainless-steel probe and a standard 1 m cable, for vehicle, warehouse and cold-chain temperature monitoring
Discuss this modelKey features
- Device operating range -40°C to +80°C, with measurement accuracy ±0.5°C from 0°C to +70°C.
- DS18B20-based temperature sensing with Modbus RS485 output; unique probe identifiers allow the receiving equipment to distinguish probes.
- A sealed stainless-steel probe rated IP65, with a standard 1 m cable and custom cable lengths available.
Functions in detail
Temperature sensing and identification
- Built around the DS18B20 chip for temperature detection and control.
- Resolution is configurable from 9 to 12 bits; maximum cycle time at 12-bit resolution is 750ms.
- Each probe has a unique identifier so the receiving equipment can distinguish multiple probes.
Probe and cable construction
- Stainless-steel tube filled with thermally conductive sealing compound for heat transfer and sealing.
- Heat-shrink insulation separates the pins to reduce short-circuit risk; ingress protection is IP65.
- Pure-copper conductors with a standard 1 m cable; specify the required length when ordering a custom cable.
Power, output and integration
- DC 5 V supply with Modbus RS485 output; confirm the receiving vehicle unit or controller supports the selected sensor.
- Red: VCC; grey: GND; green: 485A; white: 485B.
- Matching connectors for compatible vehicle terminals can be supplied; specify the connector requirement when ordering.
Technical specifications
| Parameter | Specification |
|---|---|
| Product name | Digital Temperature Sensor |
| Supply voltage | DC 5 V |
| Operating temperature | -40°C to +80°C (chip theoretical range: -55°C to +125°C) |
| Measurement accuracy | ±0.5°C (0°C to +70°C) |
| Resolution / cycle time | 9–12 bits; maximum cycle time at 12-bit resolution: 750ms |
| Signal output | Modbus RS485 |
| Ingress protection | IP65 |
| Chip | DS18B20 |
| Probe construction | Stainless-steel tube; thermally conductive sealing compound |
| Cable | Pure-copper conductors; standard 1 m cable, custom lengths available |
| Wiring: VCC power | Red |
| Wiring: GND | Grey |
| Wiring: 485A | Green |
| Wiring: 485B | White |
Installation and configuration
Use DC 5 V and follow the Digital Temperature Sensor wire colours: red VCC, grey GND, green 485A and white 485B. Check the receiving device, communication settings and connector before installation. Specify custom cable length and connector requirements when ordering. Select for the device operating range of -40°C to +80°C; the chip theoretical range is not the assembled product rating.