Relative humidity and temperature transmitter DB483

insertionRS-485Modbus RTU

Description
The DB483 humidity and temperature transmitter is designed for high‑temperature textile setting and exhaust energy‑saving systems. It provides simultaneous temperature and humidity measurement in process ducts and chambers and operates reliably at flue gas temperatures up to 250°C. The sensor uses RTD for temperature and the limiting‑current method for humidity, and it is built for continuous industrial operation with features to limit contamination and condensation.

Technical specifications
Measuring principle: Temperature (RTD); Humidity (limiting‑current method)
Measuring range: Temperature 0–250°C; Relative humidity 0–100% RH; Moisture content 0–300/500/1000 g/kg; Volume ratio 0–40% / 0–100% VOL; Optional oxygen 0–25% VOL
Accuracy: Temperature ±1°C; Relative humidity ±2% F.S.; Volume ratio H2O ±1.5% F.S.; Optional oxygen ±1% VOL
Repeatability: ±1% F.S.
Response time: T90 ≤ 20 s
Sampling method: Insertion type
Installation: Standard DN65 flange (other sizes customizable)
Probe length: Standard 400 mm (customizable)
Flue gas temperature: 0–250°C
Display: 4.3" touchscreen, 480×272, CN/EN switchable UI
Humidity calibration: Automatic zero and span calibration
Power supply: 220 VAC ±10%, 50 Hz, 20 W (24 V DC optional)
Relays: 2 channels, 3A 250 V AC / 3A 30 V DC
Output: 2 × 4–20 mA
Communication: RS485 (Modbus RTU)
Ambient conditions: -20 to 50°C, ≤93% RH non‑condensing
Protection rating: IP65

Key specifications

• Model: DB483
• Measuring principles: Temperature (RTD), Humidity (limiting‑current)
• Temperature range: 0–250°C
• Relative humidity range: 0–100% RH
• Moisture content options: 0–300 / 500 / 1000 g/kg
• Volume ratio: 0–40% / 0–100% VOL
• Optional oxygen range: 0–25% VOL
• Temperature accuracy: ±1°C
• Relative humidity accuracy: ±2% F.S.
• Volume ratio H2O accuracy: ±1.5% F.S.
• Repeatability: ±1% F.S.
• Response time: T90 ≤ 20 s
• Sampling method: Insertion type
• Installation: Standard DN65 flange (customizable)
• Probe length: Standard 400 mm (customizable)
• Display: 4.3" touchscreen (480×272), CN/EN switchable
• Calibration: Automatic zero & span
• Power supply: 220 VAC ±10%, 50 Hz, 20 W (24 V DC optional)
• Relays: 2 channels, 3A 250 V AC / 3A 30 V DC
• Output signals: 2 × 4–20 mA
• Communication: RS485 (Modbus RTU)
• Operating ambient: -20 to 50°C, ≤93% RH non‑condensing
• Protection: IP65