Pressure Sensors & Transmitters
From raw mV OEM sensors to smart HART transmitters, dynamic blast sensors to submersible level probes — 24+ models featuring German sensing technology with accuracy up to ±0.075% FS, covering -100 KPa to 220 MPa.
Two Sensing Technologies, One Engineering Standard
Every HMK pressure sensor starts with a sensing element imported from leading European semiconductor foundries. We offer two fundamental sensing technologies — each engineered to solve different measurement problems:
Piezoresistive (Diffused Silicon)
The workhorse of industrial pressure measurement. Silicon strain gauge bonded to a stainless steel diaphragm with silicone oil fill. Best for high-pressure (up to 220 MPa), fast response (≤1 ms), and wide temperature range. Models: HM10, HM20, HM22, HM25, HM28, HM60, HM80, HM90, HM91 and more.
Ceramic Capacitive (Dry Cell)
99.99% alumina ceramic diaphragm forms both sensor and process seal — no oil fill required. Ideal for food, pharma, HVAC, and any application where media contamination is unacceptable. Exceptional overload tolerance (200× FS). Models: HM12, HE10, HM26, HM23Y.
Core Model Comparison
Side-by-side specifications of our five most popular models to help you select the right starting point.
All Pressure Measurement Products
General Purpose Transmitters
Core pressure transmitters for standard industrial applications — water treatment, HVAC, process control, and automation.
HM10
Compact OEM pressure sensor with mV output. Ideal for high-volume integration, HVAC, and industrial automation.
- Range: 0~100 kPa to 0~60 MPa
- Output: mV (raw signal)
- Accuracy: ±0.1% FS
HM20
Versatile industrial pressure transmitter for general process monitoring. Diffused silicon sensor with multiple output options.
- Range: 0~100 kPa to 0~60 MPa
- Output: 4-20mA / 0-5V / 0-10V
- Accuracy: ±0.25% FS
HM22
Precision pressure transmitter with German sensing element. Superior temperature compensation for demanding applications.
- Range: 0~35 kPa to 0~60 MPa
- Accuracy: ±0.1% FS
- Temp Comp: ±0.01% FS/°C
HM24
Cost-effective pressure transmitter with optional digital display. Ideal for HVAC, water treatment, and general industrial use.
- Range: 0~100 kPa to 0~40 MPa
- Output: 4-20mA / 0-5V
- Accuracy: ±0.5% FS
HM25
Field-mount industrial transmitter with HART protocol. Die-cast aluminum housing for harsh environments.
- Range: 0~35 kPa to 0~100 MPa
- Output: 4-20mA + HART
- Accuracy: ±0.1% FS
HM26
Ceramic capacitive sensor for high-temperature process media. No fill fluid, excellent long-term stability.
- Range: 0~100 kPa to 0~25 MPa
- Temp: -40~150°C media
- Accuracy: ±0.1% FS
HM29
Smart digital transmitter with RS485/Modbus output. Built-in local display with peak/valley recording.
- Range: 0~100 kPa to 0~60 MPa
- Output: RS485 Modbus RTU
- Accuracy: ±0.1% FS
European OEM Sensors (HE Series)
European-designed sensing elements and packaged sensors. Advanced technology with multiple output options for OEM integration and specialized applications.
HE10
Compact European-designed OEM transmitter. 5 output options with modular structure for system integrators.
- Range: 20 kPa to 600 bar
- Output: 4-20mA / 0-5V / I2C
- Shock: 500g
HE23
High-precision ceramic capacitive transmitter with excellent media compatibility. No fill fluid contamination risk.
- Range: 0~40 kPa to 0~25 MPa
- Sensor: Al₂O₃ ceramic
- Accuracy: ±0.1% FS
HE24
Micro-fused glass-to-metal technology for superior long-term stability. Harsh media compatible without fill fluid.
- Range: 0~100 kPa to 0~100 MPa
- Technology: Micro-fused
- Accuracy: ±0.25% FS
HE26
Pure ceramic capacitive sensing element. Excellent corrosion resistance, ideal for food and pharmaceutical applications.
- Range: 0~40 kPa to 0~40 MPa
- Diaphragm: Al₂O₃ ceramic
- Accuracy: ±0.1% FS
HE27
Precision vacuum and absolute pressure measurement. Single-crystal silicon sensor for semiconductor and scientific equipment.
- Range: 0~10 kPa to 0~60 MPa
- Type: Absolute / Sealed Gauge
- Accuracy: ±0.1% FS
HE28
Monocrystalline sapphire sensor on titanium diaphragm. Exceptional chemical resistance for extreme environments.
- Range: 0~2.5 MPa to 0~160 MPa
- Diaphragm: Sapphire/Titanium
- Accuracy: ±0.15% FS
HE29
Digital bus-output pressure sensor with RS485 Modbus RTU or CAN 2.0B protocol. Multi-drop network capability.
- Output: RS485 / CAN 2.0B
- Protocol: Modbus RTU
- Accuracy: ±0.1% FS
HE30
Low-range differential and wind pressure sensor. Ideal for HVAC, clean rooms, and building automation.
- Range: 0~500 Pa to 0~100 kPa
- Type: Differential / Wind
- Accuracy: ±0.5% FS
HE60
Intrinsically safe pressure sensor for Zone 0/1/2. Compact design for hazardous gas and dust atmospheres.
- Certification: Ex ia IIC T6
- Range: 0~100 kPa to 0~60 MPa
- Accuracy: ±0.25% FS
HE90
Medium-frequency dynamic pressure measurement for engine testing, hydraulic systems, and pulsation analysis.
- Bandwidth: up to 10 kHz
- Range: 0~10 MPa to 0~200 MPa
- Accuracy: ±0.25% FS
HE91
Ultra-compact pressure transmitter for space-constrained installations. Thin-film sensor with all-welded stainless steel.
- Diameter: 19 mm body
- Range: 0~1 MPa to 0~100 MPa
- Accuracy: ±0.25% FS
Specialty Pressure Transmitters
Application-specific transmitters designed for challenging environments — corrosive media, explosive atmospheres, extreme temperatures, and sanitary processes.
HM27
Ultra-low vacuum measurement with high resolution. Flush diaphragm design prevents media entrapment.
- Range: 0~0.02 Pa to 0~60 MPa
- Type: Gauge / Absolute / Vacuum
- Accuracy: ±0.1% FS
HM28
Monocrystalline sapphire sensor with titanium diaphragm. Extreme pressure range up to 260 MPa.
- Range: 0~2.5 MPa to 0~260 MPa
- Diaphragm: Titanium alloy
- Accuracy: ±0.1% FS
HM50
PTFE-lined or ceramic capacitive sensing for corrosive media. Chemical plants, wastewater, and acidic/alkaline processes.
- Range: 0~100 kPa to 0~60 MPa
- Wetted: PTFE / Ceramic / Hastelloy
- Accuracy: ±0.25% FS
HM60
ATEX/IECEx certified for hazardous areas. Flameproof and intrinsically safe options for oil & gas.
- Range: 0~35 kPa to 0~100 MPa
- Certification: Ex d IIC T6 / Ex ia
- Accuracy: ±0.1% FS
HM70
Flush-mount sanitary design for food, beverage, and pharmaceutical applications. Tri-clamp connection, CIP/SIP compatible.
- Range: 0~100 kPa to 0~10 MPa
- Connection: Tri-Clamp / DIN11851
- Accuracy: ±0.25% FS
HM80
Designed for extreme temperature environments. Heat-sink structure with remote-mount capability for steam and molten processes.
- Media Temp: up to 350°C
- Range: 0~100 kPa to 0~100 MPa
- Accuracy: ±0.25% FS
HM23
Refrigerant-compatible pressure transmitter for HVAC systems, compressors, and refrigeration equipment.
- Range: 0~1 MPa to 0~10 MPa
- Refrigerant: R410A/R134a/R22
- EMC: Level 4
HM23Y
Ultra-high pressure transmitter for downhole and wellhead monitoring. Anti-vibration, anti-clogging design.
- Range: 0~10 MPa to 0~220 MPa
- Sensor: Ceramic capacitive
- Anti-clogging design
Dynamic & Micro Pressure Sensors
High-frequency dynamic and ultra-miniature pressure sensors for research, testing, and embedded applications.
HM90
Ultra-fast response for blast, combustion, and hydraulic pulse measurement. 2 MHz bandwidth with 1 μs rise time.
- Range: 0~2 MPa to 0~200 MPa
- Bandwidth: 2 MHz
- Rise Time: 1 μs
HM91
Ultra-miniature pressure sensor (Ø2.54 mm). For biomedical, aerospace, and embedded system integration.
- Diameter: 2.54 mm (0.1 in)
- Bandwidth: 1.6 MHz
- Accuracy: ±0.1% FS
How to Select the Right Pressure Sensor
Choosing the right pressure measurement device depends on four primary factors. Use this guide to narrow your selection, then contact our engineering team for application-specific recommendations.
1. Pressure Range & Type
Determine your working pressure and whether you need gauge, absolute, or vacuum measurement. Our range covers 0.5 kPa through 220 MPa. For vacuum or compound, HM20 supports -100 kPa to positive.
2. Output Signal
Raw mV for your own conditioning? HM10. 4-20mA current loop for PLC? HM20/HM25/HE10. Digital SPI/UART? HM12. HART protocol? HM29/HM3051.
3. Media Compatibility
No silicone oil contact? Choose HM12 dry ceramic. Corrosive media? HM50 with PTFE isolation. Viscous/clogging? HM23Y ceramic or flush diaphragm options. Sanitary? HM70 CIP/SIP flush mount.
4. Accuracy & Budget
Lab/calibration: HM12 (±0.075%) or HM10 (±0.1%). Standard industrial: HM20/HM25 (±0.25%). High-volume OEM: HE10 (±0.5%) for best unit cost. Dynamic research: HM90/HM91 (±0.1%).
Why Choose HMK TECH Pressure Transmitters?
Backed by German sensing technology, full international certifications, and dedicated application engineering support.
German sensing technology Sensing Technology
Core sensing elements imported from German sensing technology, Germany — delivering ±0.075% FS accuracy and long-term stability rated at ±0.1% FS/year across our premium product lines.
Full International Certifications
CE, RoHS, ATEX/IECEx explosion-proof, SIL 2 functional safety, IP67/IP68 ingress protection — ready for global deployment in hazardous and critical applications.
Application Engineering Support
Our engineers help you select the right model, customize pressure ranges, output signals, process connections, and materials — ensuring optimal performance for your specific application.
Frequently Asked Questions
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