EA33A economical micro differential pressure switchDetailed product description：

The EA33A economical micro differential pressure switch can be used to sense pressure and airflow differences in pipelines. Common applications include:

1. Monitoring filter blockage alarm device
2. Monitor the start/stop status of the fan in the air conditioning unit
3. Gas monitoring in heating and ventilation ducts
4. Control the maximum airflow in a variable gas volume system
5. Gas control in combustion furnace

Measurement range:
Range 20-300Pa<± 2.5Pa
Maximum medium pressure: 300mbar
Medium temperature limit: -15/+60 ℃
Protection level: IP54
Electrical rating: 2A 220VAC

Installation:
1. Install in the position with minimal vibration
2. TP33A factory calibration is performed at room temperature, and it is best to install it in an environment close to room temperature
3. In systems with high humidity, condensation of water vapor may occur, so the differential pressure switch should be installed with the pipe facing downwards

Note:
If the installation of the differential pressure switch is not carried out according to the above instructions, and the two ports are facing downwards, the pressure difference detected by the switch point will deviate by 20Pa, which is mainly determined by the principle of the differential pressure switch
There is a very thin gas film in the differential pressure switch that divides the interior into two chambers. If the gas film is not installed vertically but horizontally, its own weight will affect the gas
Body pressure difference detection).
2. To avoid electric shock or damage to the equipment, make sure the power switch is turned off when removing the cover.
3. Before use, complete the wire connection and check the connection status. Incorrect wiring may cause permanent damage to this device.
4. In low current (0.1A or less) situations, when the voltage is less than 30V, it is recommended to connect an R.C network to the circuit.
5. Before use, plastic pipe installation holes should be drilled and the "Z-shaped" bracket should be installed on site (standard configuration).
6. Ensure minimal or no vibration on the assembly surface, and the switch can be directly fixed on the pipeline, heater, or panel.
7. Pressure connection position annotation:+(high pressure) and - (low pressure or static pressure).

Attachment:
1 1.6m long plastic pipe and 1 "Z" shaped support plate, 2 self tapping screws and 2 rubber washers
Range 50-2000Pa<± 5Pa
Range 1000-5000Pa<± 15Pa