The device is low-cost, simple to make, highly reliable, and highly accurate (plus or minus 0.3 degrees, determined by the sensitivity of the electric contact thermometer). Anyone with a basic knowledge of electronics can install it, and it has a power failure alarm. After a power failure, biogas, charcoal, or hot water can be used for heating. If the actual temperature exceeds the required temperature, the alarm will sound. This thermostat is suitable for large, medium, and small electric incubators and various constant temperature devices.
The specific circuit is shown in the figure, and the working principle and production of the constant temperature device are briefly described as follows.
When the 220V power supply is turned on, the thermostat is in the heating state.
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