Description

The BL798 is a rugged, accurate temperature and relative humidity probe. It measures relative humidity over the range of 0 to 100% RH and temperature over the range of -40°C to +160°C. Alternatively, the range can expanded from -40°C to +180°C.

FEATURES

• RH accuracy up to 1.0%RH
• Temperature accuracy up to 0.6℃
• Temperature measuring range -40…+180℃
• Full 0…100%RH measure, +80℃ measure
• Modbus RTU over RS-485
• Easy Installation and connection
• Sensor purge improves long-term stability and chemicalresistance

APPLICATION

• Industrial applications where periodic recalibration alone is not sufficient for maintaining the probe performance.
• Industrial HVAC systems, cleanrooms, and environmental chambers.

SPECIFICATION

Relative Humidity Measurement

• Sensor type: Thin film capacity
• Range: 0…100%RH
• Accuracy @23℃: ±1.0%RH (0…90%RH)
• T₆₃ response time: 20 seconds
• Uncertainty: ±0.6%RH (<40%RH); ±1%RH (40…95%RH)

Temperature Measurement

• Sensor type: Pt100 RTD1/3 Class B IEC751
• Range: -40℃…+160℃, -40℃…+180℃ (option)
• Accuracy @23℃: ±0.6℃ (<40%RH), ±1℃(40…95%RH)
• Calibration uncertainty: ±0.1℃

Operating Environment

• Operating temperature of probe head: -40℃…+160℃, -40℃…+180℃ (option)
• Operating temperature of probe body: -40℃…+60℃
• Storage temperature: -40℃…+80℃
• Operating environment: Suitable for outdoor use
• Measurement environment: For air, N2， H2，Ar, He, O2
• IP rating of probe body: IP66

Input and Output

• Operating voltage: 18 to 28VDC
• Current consumption: 10mA typical, 500m max
• Digital Output: RS485, non-isolated
• Protocols: Modbus RTU

Mechnical infos:

• Connector: M12-pin A-coded male
• Weight: 250g
• Probe cable length: 2 meter
• Probe material: 316L
• Probe body material: 316L
• Cable jacket material: FEP

SCOPE OF DELIVERY

• Humidity & temperature probe w/ 2m cable
• Analog part

OPTIONAL ACCESSORIES AND SERVICCE

• ISO17025 accredited calibration certificate   (CAL-798)
• BL7330 temperature & humidity transmitter (BL7330)
• Chemical purge function (798-CP)