Temperature switches SENSIT TSZ4H-24 with a display are used for switching devices on and off according to the set and measured temperature. The temperature is measured by one or two sensors that connect to the switch. The switch has two independent contacts that toggle when a certain temperature is reached. The contacts are isolated from the switch's power supply, which is 10 to 33 VDC / 9 to 24 V AC. The current temperature from both sensors is alternately shown on the switch's display. The switch is set using two buttons.

The switch can be set to five different modes:

• Mode no. 1: the switch turns one device on and off according to the temperature from one sensor and the second device only in case of an emergency temperature
• Mode no. 2: the switch turns each device on and off separately according to the temperature from one sensor
• Mode no. 3: the switch turns each device on and off separately according to the temperature from its own sensor
• Mode no. 4: the switch turns the device on and off according to the temperature difference between two sensors (similar to mode no. 1)
• Mode no. 5: the switch turns each device on and off separately according to the temperature difference between two sensors (similar to mode no. 2). For each mode, the device's switch-on delay (for contact 1) can be set from 0 to 300 s. The switches are mounted on a DIN rail.

The temperature range of the switch's use depends on the type and variant of the temperature sensor (e.g., for a sensor in a TG 8 casing, the range is -50 to 200 °C). The maximum temperature range for the use of switches is -50 to 400 °C.