Relative humidity and temperature transmitter DB5301

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Product Overview
A high-precision temperature and humidity transmitter designed for data centers, communication rooms and industrial environments. Equipped with a Swiss imported digital humidity sensor, DB5301 provides accurate and stable measurement of temperature and relative humidity. Advanced EMC protection (surge, EFT burst immunity, electromagnetic isolation) ensures reliable operation in electrically noisy environments. Supports RS485 Modbus RTU and optional outputs such as dew point, absolute humidity and mixing ratio. Available in wall-mounted, duct-mounted and remote probe versions for cabinet, duct and battery room monitoring.

High Accuracy Measurement

• Swiss imported digital humidity sensing chip for long-term stability.
• Humidity measurement range: 0…100 %RH.
• Humidity accuracy: ±2.0 %RH (20…80 %RH @25℃).
• Temperature measurement range: -40…120 ℃ (depending on probe).
• Temperature accuracy: ±0.2 ℃ (0…60℃).
• Annual stability: <1 %RH/year; <0.1 ℃/year.

Advanced EMC Protection
Designed for environments with strong electromagnetic interference, DB5301 provides:

• Surge protection.
• Electrical fast transient (EFT) burst immunity.
• Electromagnetic isolation.

EMC compliance:

• IEC 61000-4-4: EFT immunity 1 kV, Class A.
• IEC 61000-4-5: Surge immunity 500 V, Class A.
• IEC 61000-4-2: ESD immunity 4 kV contact / 8 kV air, Class B.

Flexible Communication & Networking

• RS485 digital interface.
• Modbus RTU protocol.
• Communication distance up to 1200 m.
• Configurable address 1–255 and baud rate 9600–115200 bps.
• Supports multi-point networking for centralized monitoring.

Flexible Installation Options
Multiple mounting choices:

• Wall-mounted.
• Duct-mounted.
• Remote probe.
• Flange, thread, clip and insertion installations.

Customized Humidity Parameters

• Optional dew point output.
• Optional absolute humidity output.
• Optional mixing ratio output.
• Other humidity-related parameters available on request.

Applications

• Data centers & communication rooms: room and cabinet hot/cold aisle monitoring; modular data centers; battery room monitoring; PUE auxiliary monitoring.
• HVAC & building automation: fresh and return air monitoring; terminal control; heating pipeline measurement; energy management systems.
• Pharmaceutical storage & laboratories: medicine warehouses; vaccine cold storage; test chamber and incubator monitoring; safety and ventilation cabinet monitoring; lab refrigerator alarms.
• Industrial & indoor environments: warehouses; schools; hospitals; museums; production facilities; constant temperature and humidity chambers.

Technical Specifications

• Product Type: Temperature Humidity Transmitter
• Model: DB5301
• Humidity Measurement Range: 0…100 %RH
• Temperature Measurement Range: -40…120 ℃ (depending on probe)
• Humidity Accuracy: ±2.0 %RH (20…80 %RH @25℃)
• Temperature Accuracy: ±0.2 ℃ (0…60℃)
• Humidity Sensor: IIC Digital Humidity Sensor
• Temperature Sensor: Pt1000, IEC60751 (DIN43760), α=0.003850
• Stability: <1 %RH/year, <0.1 ℃/year
• Communication Interface: RS485
• Communication Protocol: Modbus RTU
• Communication Distance: ≤1200 m
• Address Range: 1–255
• Baud Rate: 9600–115200 bps
• Power Supply: 9–36 VDC
• Probe Operating Temperature: -40…120 ℃ (optional)
• Transmitter Operating Temperature: -20…60 ℃
• Response Time T63: Humidity ≤8s; Temperature >2s
• Power Consumption: <2.5 W
• Display: Large LCD display (optional)
• Protection Level: IP67 available as customization option
• Installation: Wall-mounted / Duct-mounted / Remote Probe / Flange / Thread / Clip / Insertion