OT-W400 Intelligent Temperature & Humidity Controller

This instrument uses an advanced microcontroller as its control core and is equipped with high‑performance imported temperature sensors. It can simultaneously measure and control temperature and humidity signals, with digital display functionality.
Upper and lower limits for both temperature and humidity can be configured via buttons, enabling the device to automatically activate fans or heaters based on real‑time environmental conditions, thereby regulating the measured temperature and humidity.
Operating status is indicated by two green LEDs, providing clear action feedback. The intelligent control design allows the instrument to adapt to complex and variable field environments, effectively protecting equipment.
This instrument is suitable for various cabinet types, including high‑ and low‑voltage switchgear, terminal boxes, and box‑type substations.

Technical Specifications

Power Supply: AC220V ±10%

Operating Environment: –20 to +50°C; relative humidity ≤95%RH

Control Range: 0–99.9°C; 10–99%RH

Control Accuracy: Temperature ±0.5°C; Humidity ±5%RH

Power Consumption: ≤5W

Output Contact: AC220V, 5A (resistive load)

Panel and Operation

Press and hold the setting key to enter the parameter configuration interface. Press the setting key again to cycle through each parameter.

Temperature start value

Temperature hysteresis value

Heating/Cooling mode selection (1 = heating mode, 0 = cooling mode)

Humidity start value

Humidity hysteresis value

Humidifying/Dehumidifying mode selection (1 = humidifying, 0 = dehumidifying)

Communication address setting (default: 001)

Baud rate setting (default: 9600)

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