Application Field and Working Principle of OHD3-90M

The OHD3-90M is a mechanical thermostat with temperature sensing capabilities. It is commonly used as a temperature controller in many different applications, such as HVAC systems, refrigeration equipment, and general industrial applications. This thermostat is designed to work with sensitive electronic components, in order to ensure accurate temperature control over a wide range of operating conditions.

The OHD3-90M has a basic design, with two basic components: a mechanical switch and a sensing element. The switch is normally closed, meaning that any input voltage will turn the switch on. In addition, the switch has a protection circuit which prevents it from being damaged by excessive current. The sensing element, on the other hand, is a thermistor, a temperature-sensitive resistor whose resistance changes with temperature.

When the temperature rises above the set point temperature, the thermistor\'s resistance will increase, resulting in a reduction in current across the switch. This will cause the switch to open, thus breaking the circuit. Conversely, when the temperature falls below the set point temperature, the resistance of the thermistor will decrease, resulting in an increase in current across the switch. This will cause the switch to close, thus completing the circuit.

The OHD3-90M can operate over a wide range of temperatures, from -30°C to +200°C. This makes it suitable for use in almost all kinds of applications and environments. This thermostat is also designed to be durable and reliable, with a long service life.

In addition to temperature control applications, the OHD3-90M can also be used to monitor temperature in specific areas or zones. Using the thermistor, the OHD3-90M can detect changes in temperature, thus providing an early warning for potential malfunctions or other Changes in temperature.

The OHD3-90M is a reliable and economical choice for temperature control applications, with its simple design and robust construction. It is also highly accurate and reliable, ensuring accurate temperature control.