4-20mA Pressure Sensor | 0-4MPa Range | M20x1.5 Thread Connection

This digital pressure sensor changes a physical pressure reading into a standard 4-20mA electrical signal. With its M201.5 thread and various ranges, like 0-20kPa, it connects directly to factory control systems. This allows for reliable monitoring of liquids or gases. Features and Benefits - 4-20mA output signal - This pressure transmitter sends a steady, industry-standard signal. It is less affected by electrical noise over long cable runs. - Digital compensation - The internal electronics adjust for temperature changes. This gives a more accurate and steady reading than purely analog devices. - M201.5 process connection - This is a common factory thread size, making installation simple and secure. - Specific pressure ranges - Choosing the right pressure transducer is easy. Just match the range (e.g., 0-20kPa) to your system's operating pressure. Applications - Checking air and water pressure in commercial HVAC systems. - Measuring fluid levels and filter status in water treatment plants. - Controlling hydraulic and pneumatic equipment in manufacturing. Safety & Preparation Before installing or testing any pressure sensor, ensure all power sources are disconnected to prevent electrical shock or damage to equipment. Verify that the process connection on the sensor, M20x1.5, matches the system it will be installed into. Using incorrect fittings can lead to leaks or sensor damage. Always wear appropriate personal protective equipment, such as safety glasses, when working with pressurised systems. Handle the transducer carefully to avoid impact damage, which could affect its accuracy. Check Excitation Voltage Pressure transducers require an excitation voltage to operate. While this product does not include a battery, it will need an external power supply. For a 4-20mA output pressure sensor, a common excitation voltage is 24V DC, though other voltages like 5V or 10V may be used for different transducer types. Consult your system's specifications or the sensor's manual to confirm the correct voltage. Applying an incorrect voltage can damage the transducer. Use a multimeter to verify the power supply output before connecting it to the sensor. Test Output Signal (Zero Pressure / No Load) To test the pressure sensor, first connect it to the appropriate excitation voltage. With no pressure applied to the M20x1.5 connection, the sensor should output its zero-pressure signal. For this 4-20mA Pressure Sensor, the output at 0 MPa should be 4 mA. Use a multimeter set to measure current to check this. If the reading is significantly different, ensure correct wiring and power supply. This initial test helps confirm the transducer is functioning correctly before installation into a pressurised system. For Current Output Transducers (4–20 mA): This 4-20mA Pressure Sensor outputs a current signal that is proportional to the applied pressure. The lowest pressure in its range (0 MPa) corresponds to 4 mA, and the highest pressure (4 MPa) corresponds to 20 mA. To test the full range, connect the sensor to a known pressure source and measure the output current with a multimeter. For example, if you apply 2 MPa, you would expect an output of approximately 12 mA. This signal can then be read by a logic controller or other monitoring equipment. For Voltage Output Transducers (0–5V, 0–10V, or mV): This specific pressure sensor has a 4-20mA output signal, not a voltage output. However, for pressure transducers with a voltage output, the principle of operation is similar. The transducer converts pressure into a corresponding voltage, such as 0-5V or 0-10V. You would measure this voltage with a multimeter. A strain gauge inside the transducer changes resistance with pressure, altering the voltage across it. This allows a device like a logic controller to interpret the applied pressure.