OT-W500 Intelligent Temperature & Humidity Controller 01

OT-W500 Intelligent Temperature & Humidity Controller

The instrument uses an advanced microcontroller as its control core and is equipped with high‑performance imported temperature and humidity sensors. It can simultaneously measure and control temperature and humidity signals and provides LCD digital display functionality.
Upper and lower limits for temperature and humidity can be configured and displayed via buttons, enabling the instrument to automatically activate fans or heaters based on real‑time environmental conditions, thereby regulating the actual temperature and humidity of the monitored environment.
Action indication is provided through two normally‑open contact outputs, enhancing intelligent operation and enabling the instrument to adapt to complex and variable field conditions, effectively protecting equipment.
This instrument is suitable for various cabinet types, including high‑ and low‑voltage switchgear, terminal boxes, and box‑type substations.

Product Features

Equipped with an LED LCD display.

Temperature measurement range: 0–99°C.

Humidity measurement range: 0–99%RH (if the sensor is disconnected or damaged, the display shows a fixed value of 10%RH).

Dew‑point measurement range: 60–93%RH.

Independent upper and lower limit settings for temperature and humidity via buttons (dew‑point control not adjustable), with power‑off parameter retention.

Technical Specifications

Power Supply: AC220V ±10% 50Hz; DC220V

Operating Environment: –20 to 70°C; relative humidity ≤95%RH

Control Range: Temperature 0–99°C; Humidity 0–99%RH; Dew‑point activation at 93%RH

Control Accuracy: Temperature ±1°C; Humidity ±5%RH

Power Consumption: ≤3W

Output Interface: AC220V, 5A

Logical Control Relationships

1. Heating–Cooling Mode (with heater and fan)
(1) When the ambient temperature is too high (above the upper temperature limit), the fan starts. When the measured temperature drops to the upper limit minus 5°C, the fan stops.
(2) When the ambient temperature is too low (below the lower temperature limit), the heater starts. When the measured temperature rises to the lower limit plus 5°C, the heater stops.
(3) When the ambient humidity is too high (above the upper humidity limit), the fan starts to increase ventilation and reduce humidity. When humidity falls below the lower humidity limit, the fan stops.

2. Cooling Mode (fan only)
(1) When the temperature is too high (above the upper temperature limit), the fan operates to increase ventilation and reduce temperature. When the temperature drops to the upper limit minus 5°C, the fan stops.
(2) When humidity is too high (above the upper humidity limit), the fan operates to increase ventilation and reduce humidity. When humidity falls below the lower humidity limit, the fan stops.

3. Heating Mode (heater only)