Ambient Temperature Sensor
Pt1000 Class A ambient temperature sensor with RS-485 Modbus RTU output.
Product overview
The BKC–AT RS485-MB is a high-accuracy, industrial-grade ambient temperature sensor designed for precise and reliable temperature monitoring in indoor environments and industrial applications. It features a Pt1000 RTD (Resistance Temperature Detector) sensing element with Class A accuracy, ensuring dependable temperature measurement.
Equipped with an RS-485 interface and Modbus RTU communication protocol, the sensor provides reliable, noise-resistant data transmission for integration with SCADA systems, PLCs, data loggers, and industrial automation platforms.
The sensor features a robust aluminium sensing probe, a 3-meter Teflon-coated cable, and a powder-coated aluminium electronic enclosure with IP67-rated protection. Its design supports reliable operation in industrial monitoring environments where accurate ambient temperature measurement is essential.

Key features
- High-accuracy ambient temperature measurement
- Pt1000 RTD sensing element with Class A accuracy
- RS-485 interface with Modbus RTU protocol
- Three-wire sensor connection
- Reliable, noise-resistant digital communication
- Robust aluminium sensing probe
- Powder-coated aluminium electronic enclosure
- IP67-rated enclosure protection
- 3-meter Teflon-coated sensor cable
- Wide DC supply voltage range of 5–24 V
- Factory-configured Modbus communication settings
- One-year standard warranty
Where it is used
- Indoor ambient temperature monitoring
- Industrial automation and process monitoring
- SCADA systems and data acquisition
- Electrical control panels and equipment rooms
- Warehouses and storage facilities
- Laboratories and testing environments
- HVAC and building management systems
- Industrial environmental monitoring
Technical specifications
| Interface | RS-485 |
|---|---|
| Communication Protocol | Modbus RTU |
| Sensor Element | Pt1000 RTD |
| Accuracy Class | Class A |
| Connection Type | 3-wire |
| Sensor Housing | Aluminium, 6 mm OD × 35 mm length |
| Sensor Mount | Self-adhesive aluminium block, 30 × 12 × 6 mm |
| Sensor Cable | 3 meters, Teflon-coated |
| Operating Temperature Range | −50°C to +150°C |
| Sensor Element Range | −30°C to +600°C |
| Calibration Equipment | Fluke 9144 and Fluke 724 |
| Power Supply | 5–24 V DC |
| Enclosure Material | Powder-coated aluminium |
| Enclosure Dimensions | 80 × 75 × 57 mm |
| Protection Rating | IP67 |
| Warranty | 1 year |
Need this sensor in a complete station?
We integrate sensors, data loggers, towers and software into turn-key weather monitoring systems.
