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HPM288S Intelligent Protective SPDT Digital Pressure Switch

Switch Type: 2×SPDT
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The HPM288S explosion-proof pressure switch features a high-performance silicon piezoresistive pressure core body. This core body undergoes conversion by a high-precision A/D converter, microprocessor processing, on-site display, and output of one analog quantity and two switching quantities. This product seamlessly integrates pressure measurement, display, output, and control, making it highly versatile in industrial applications such as process control, petroleum, chemical, metallurgical, and mining industries. It complies with standards for explosive environments, including gb3836.1-2010 and gb3836.2-2010. The equipment is protected by a flameproof Enclosure "D" with explosion-proof marks Exd II CT6. The flameproof pressure sensor can operate normally under specific environmental conditions: altitude below 2000m, ambient air temperature ranging from -10ºC to +60ºC, and ambient relative humidity of 90% at +25ºC.


  • Segregation explosion-proof Exd II CT6 Gb, explosion-proof number CNEx19.4440
  • Switching value can be set arbitrarily from zero scale to full scale
  • Shell with action nodes light emitting diode, easy to observe
  • Key adjustable and field setting various parameters, easy to operate
  • Two-way control point relay output
  • Analog output (4-20mA) optional

Technical Parameters

Pressure Range



1.5x of full scale

Output Signal

4~20mA or relay

Power Supply24VDC(12~30VDC)


±0.5%FS(standard),±0.25%FS (Option)

Long-term Stability


Temperature Coefficient 

±0.03%FS/℃(Reference 25℃)

Working Temperature


Protection Grade


Electrical Connection

Cable gland (M20*1.5)

Process Connetion

M20*1.5,G1/2,G1/4 NPT1/2 etc.

Our product philosophy is specialization, customization, and intelligence.

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    Add : Room 201, Building 5, No.18, Fenghua Road, Yuhua Economic Development Zone, Nanjing, Jiangsu,China
    Phone : +86-13270442058
    E-mail : info@hjsensor.com
   Whatsapp : +86-13270442058
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