Pressure Transducer Transmitter Sensor G1/4 0.5MPa Stainless Steel Water Gas DC 5V

The HK3022 Pressure Transducer / Transmitter Sensor is a high-quality industrial-grade pressure sensor built to measure the pressure of non-corrosive gases and liquids including water, air, gas, oil, and similar media. Housed in a robust 304/316 stainless steel shell with a G1/4 male thread connection, it is engineered for reliable long-term operation in both industrial and consumer applications.

The sensor operates from a single 5V DC supply and delivers a clean, ratiometric analog output of 0.5V to 4.5V that corresponds directly to the 0 to 0.5 MPa (0 to 72.5 PSI) measurement range. This output format is directly compatible with the analog input of any microcontroller — including Arduino, ESP32, STM32, Raspberry Pi (via ADC), and PLCs — without requiring additional signal conditioning circuitry.

At its core, the sensor uses an imported precision pressure chip combined with a Hall-effect-based signal processing circuit, providing ±1% FS accuracy, an ultra-fast response time of less than 2 milliseconds, and a wide temperature compensation range. The sensor can safely handle an over-pressure of up to 1.5 MPa and a burst pressure of 3.0 MPa, giving plenty of safety margin in real-world conditions.

The HK3022 is widely used in wall-hanging gas boilers, water heaters, gas storage tanks, air compressors, hydraulic systems, pneumatic equipment, irrigation systems, and water pump control. It is rated for a 500,000-cycle service life, making it suitable for continuous monitoring applications.

Important note: This sensor is rated for non-corrosive media only — do not use with acids, alkalis, salt water, or other corrosive fluids, as this will damage the diaphragm. The pressure range can also be customized by the manufacturer upon request.

Specifications

Electrical

• Working Voltage: 5.0 VDC
• Output Voltage: 0.5 – 4.5 VDC (ratiometric analog)
• Working Current: ≤10 mA
• Response Time: ≤2.0 ms

Pressure

• Working Pressure Range: 0 – 0.5 MPa (0 – 72.5 PSI / 0 – 5 Bar)
• Maximum (Overload) Pressure: 1.5 MPa
• Burst (Destroy) Pressure: 3.0 MPa

Accuracy

• Measuring Error: ±1% FSO (Full Scale Output)
• Temperature Range Error: ±3.5% FSO
• Static Accuracy: ±1.0% FS

Environmental

• Working Temperature: 0 °C to +85 °C
• Storage Temperature: 0 °C to +100 °C
• Wide temperature compensation range

Mechanical

• Model: HK3022
• Pressure Port / Thread: G1/4" male
• Housing Material: 304 Stainless Steel
• Diaphragm: Stainless steel
• Cycle Life: 500,000 cycles
• Compatible Media: Non-corrosive gases and liquids (water, air, oil, gas, etc.)

Wiring (Typical)

• Red wire: +5V DC (VCC)
• Black wire: GND
• Yellow / White wire: Analog Output (0.5 – 4.5V)

Output Formula (for microcontroller use)

To convert the analog output voltage to pressure:

Pressure (MPa) = (Vout − 0.5) × 0.5 / 4.0

Or in PSI:

Pressure (PSI) = (Vout − 0.5) × 72.5 / 4.0

Applications

• Wall-hanging gas boilers and water heaters
• Gas furnaces and gas storage tanks
• Air compressors and pneumatic systems
• Hydraulic systems and machinery
• Water pumps and pump pressure control
• Irrigation and sprinkler systems
• HVAC systems (heating, ventilation, air conditioning)
• Coffee machines and beverage equipment
• Industrial process monitoring
• Automotive fluid pressure monitoring
• IoT-based pressure logging with Arduino, ESP32, Raspberry Pi
• PLC and industrial automation projects
• Pressure leak detection systems