HekaBot - Model HB0-TH-01 -Temperature and Humidity Sensor for Environmental Monitoring
The HB0-TH-01 temperature and humidity sensor is designed for precise environmental and weather monitoring. It is capable of measuring ambient temperature and relative humidity and is suitable for both stand and wall mounting within various weather monitoring systems. It uses Modbus RTU (RS-485) communication with multiple baud rates supported, ensuring versatile integration into existing systems. The sensor operates within a temperature range of -40°C to +125°C and a humidity range of 0% RH to 100% RH, with high accuracy and reproducibility. The device includes features such as reverse polarity protection and bus termination. Proper cable management and the use of shielded cables in electrically noisy environments are necessary to minimize interference. Long-term stability is ensured with minimal drift, making it reliable for extended use, with specified response times for both temperature and humidity measurements. SELV transformers are required for safe operation, aligned with local safety regulations and considering power consumption for transformer sizing.
- Calibrated and temperature compensated
- Excellent humidity/temperature accuracy and stability
- High chemical resistance
- Modbus RTU (RS-485)
- Wide humidity and temperature range
- Very low drift
- Very stable at high humidity
- Interchangeable without adjustments
- Mechanically robust
HB0-TH-01 are used in environment and weather monitoring system
- Relative humidity
- Temperature
The sensor is used as a measuring sensor for temperature relative humidity of ambient.
The units are designed for stand or wall mounting and can be deployed with most types of
Weather monitoring system (WMS) stand. The cables can be connected through PG cable gland.
Measured value
HB0TH01 provides the measured values on its Modbus holding register. The following measured values are displayed, alternating at intervals of 1 s:
- Temperature: in °C or °F
- Humidity: in % h.
The following impacts the accuracy of measurement:
- Prevailing air flow
This application-specific measuring inaccuracy is constant for an installed sensor after approx. 1 hour of operation and can be adjusted as needed in a higher system (e.g. controller).
Powering the sensor requires a transformer for safety extra low-voltage (SELV) with separate windings for 100 % duty. When sizing and protecting the transformer, comply with all local safety regulations. When sizing the transformer, consider the sensor’s power consumption. For correct wiring, see the related device data sheets. Observe all permissible line lengths.
Cable routing and cable selection Note that when routing cables, the longer the cable runs and the closer the cables, the greater the electrical interference. Use shielded cables in EMC-prone environments. Twisted pair cables are required for both secondary supply lines and signal lines.
- Model: HB0-TH-01
- Operating temperature range: -40 °C to +125 °C
- Operating humidity range: 0 % RH to 100 % RH
- Hysteresis: < ±1 % RH
- Operating voltage: 9 V – 35V
- Current consumption:<100 mA
Communication: Modbus RTU (RS-485)
- Supported baud rate: 9600; 19200; 38400; 57600; 76800; 115200
- Transmission format: 1-8-E-1; 1-8-O-1; 1-8-N-1; 1-8-N-2
- Reverse polarity protection: Yes
- Bus termination: 120 ohm
- Storage conditions: -20 °C to +50 °C
Temperature
- Accuracy: ±0.2 K (0 °C to +60 °C)
- Reproducibility: ±0.1 K
- Resolution: +0.015 °C
- Long-term drift: < 0.05 K/a
- Response time t6 3: < 12 s with membrane filter
Relative Humidity
- Accuracy: ±1.8 % RH at +23 °C (0 % RH to +90 % RH)
- Reproducibility: ±0.2 % RH
- Resolution: 0.02 % RH
- Long-term drift: < 0.5 % RH/a
- Response time t63: < 12 s with membrane filter