HD 4045 Digital LED ON/OFF temperature regulator 48x78. Pt100 sensor. Range -50°C…+800°C. Resolution 1°C. Hysteresis 1...20°C. Relay 5A/220V resistive. Power supply 24Vac/dc, on request 110…230Vac/dc. Without probe.

This is a temperature regulator, controller with relay ON/OFF output. 

The setting of the intervention temperature
(set point) is carried out by pressing the button
on the left of the front panel of the instrument
and turning the knob on the right until the
temperature at which the relay contact is to
open is shown on the display. Intervention
hysteresis may be adjusted with a trimmer at
the rear of the instrument. 

The temperature sensor is a PT 100. 
If it is connected with 2 wires with a section of 1 mm2 , a reading in excess of 0.06°C/m is obtained.
In order to cut down error a three-wire connection is advised, with the third wire connected to terminal 2. The thermostat may be used either for heating or for cooling, simply by moving the jumper at the rear of the instrument. 
When the jumper is in HEATING position, the relay is energized if the probe temperature is lower than the set temperature; when the jumper is in COOLING position, the relay is energized if the probe temperature is higher than the set temperature.

• Using range: -50C ... +800°C

• Resolution: 1 °C

• Display: LED, height 12.7 mm

• Precision: 1°C ± 0.3% of reading + probe tolerance

• PT 100 Connection: with two or three wires

• Power supply: 24V/3VA

• Outputs: relay contact 5A/22OVAC. resistive

• Hysteresis: 0,1 ... 5°C

• Working temperature: -5 ... +45°C

• Dimensions: front panel 78 x 48 mm instrument body 72 x 42 x 78 mm