HVAC/R & COMPRESSOR APPLICATIONS
HM23 HVAC/R & Compressor Pressure Transmitter
Purpose-engineered for HVAC/R systems, compressors, and refrigeration equipment. Compatible with R-134a, R-410A, R-407C, R-404A, and other common refrigerants — featuring full IEC 61000 EMC protection with built-in voltage stabilizer for demanding OEM environments.
- ±0.25% FS typical accuracy, 0–100 kPa to 60 MPa range
- 4-20 mA / 1-5 V / 0-5 V / 0.5-4.5 V DC outputs
- Full IEC 61000 EMC: ESD 8kV, Surge 2kV, Burst 2kV
- -40°C to +125°C media temperature, IP65/IP67
- 25G shock, 10G vibration — compressor-mount ready
Overview | Specifications | Features | Applications | Ordering Guide | FAQ | Get Quote
Product Overview
The HM23 pressure transmitter is purpose-engineered for HVAC/R systems, compressors, and refrigeration equipment. Compatible with a wide range of refrigerants (R-134a, R-410A, R-407C, R-404A, etc.), refrigerant-lubricant mixtures, oils, water, and gases, the HM23 delivers accurate pressure measurement across the full spectrum of air conditioning, heat pump, and industrial refrigeration applications.
Featuring comprehensive EMC protection compliant with IEC 61000 standards, a built-in voltage stabilizer for unregulated power supplies, and wide-range temperature compensation from -40°C to +125°C media temperature, the HM23 is designed for reliable operation in demanding OEM environments. ODM customization is available for customers with specific enclosure, connection, or electrical requirements.
Technical Specifications
| Parameter | Value |
|---|---|
| Measuring Range | 0–100 kPa … 60 MPa |
| Overload Capacity | 2× full scale |
| Pressure Type | Gauge pressure, absolute pressure |
| Media Compatibility | Refrigerants, refrigerant-lubricant mixtures, oil, water, gas (316 SS) |
| Overall Accuracy | Typical: ±0.25% FS; Maximum: ±0.4% FS |
| Long-Term Stability | Typical: ±0.1% FS/year; Maximum: ±0.2% FS/year |
| Zero Temperature Drift | Typical: ±0.015% FS/°C; Max: ±0.03% FS/°C |
| Sensitivity Temperature Drift | Typical: ±0.015% FS/°C; Max: ±0.03% FS/°C |
| Response Time | ≤3 ms |
| Media Temperature | -40°C to +125°C |
| Compensation Temperature | -20°C to +80°C |
| Ambient Temperature | -40°C to +75°C |
| Power Supply | Wide-range with built-in stabilizer |
| Signal Output | 4–20 mA / 1–5 V DC / 0–5 V DC / 0.5–4.5 V DC |
| Vibration Tolerance | ≤ ±0.01% FS (X, Y, Z axes, 200 Hz/g) |
| Vibration Stability | Random 10G, 10–2000 Hz; Sine 25G |
| Protection Rating | IP65 (plug) / IP67 (cable) per IEC 60529 |
| Explosion Protection | Ex ia II CT5 (optional) |
| Weight | Approx. 250 g |
EMC & Environmental Ratings
Full IEC 61000 series compliance for reliable operation in electrically noisy HVAC/R and compressor environments.
| EMC Test | Standard & Rating |
|---|---|
| Radioactivity Emissions | EN 50081-1 |
| ESD Immunity | Air: 8 kV; Contact: 4 kV (IEC 61000-4-2) |
| RF Field Radiation Immunity | 10 V/m, 80–1000 MHz (IEC 61000-4-3) |
| RF Field Conduction Immunity | 3 emf/V, 150 kHz–80 MHz (IEC 61000-4-6) |
| Fast Transient Burst Immunity | 2 kV, 5 kHz (IEC 61000-4-4) |
| Surge Immunity | 2 kV (IEC 61000-4-5) |
| Dielectric Strength | 500 V, 50 Hz (SEN361503) |
Key Features
Refrigerant Compatible
Designed specifically for refrigerants (R-134a, R-410A, R-407C, R-404A, etc.), refrigerant-lubricant mixtures, and standard HVAC fluids with 316 SS wetted parts.
Full IEC EMC Protection
Comprehensive electromagnetic compatibility per IEC 61000 series: ESD (8 kV air), surge (2 kV), fast transients (2 kV), and RF immunity for electrically noisy environments.
Built-In Voltage Stabilizer
Integrated power supply stabilizer accepts unregulated voltage input, eliminating the need for external power conditioning in OEM installations.
Wide Temperature Compensation
Operating media temperature from -40°C to +125°C with compensation from -20°C to +80°C, covering the full range of HVAC/R operating conditions.
25G Shock & 10G Vibration
Survives 25G sine shock and 10G random vibration (10–2000 Hz), designed for compressor-mounted installations with high mechanical stress.
ODM Customization
Dedicated design team for custom enclosures, connections, and electrical configurations to meet specific OEM platform requirements.
Application Scenarios
Purpose-built for HVAC, refrigeration, and compressor OEM applications worldwide.
Commercial HVAC Systems
Chiller suction/discharge pressure monitoring, rooftop unit control, VRF/VRV system refrigerant pressure management.
Industrial Refrigeration
Cold storage facility compressor monitoring, ammonia and CO₂ refrigeration systems, ice rink plant pressure control.
Air Compressor Systems
Screw, reciprocating, and scroll compressor discharge/interstage pressure measurement for efficiency optimization.
Heat Pump Systems
Air-source and ground-source heat pump refrigerant circuit pressure monitoring for defrost control and efficiency.
Automotive A/C Testing
Production line testing of automotive air conditioning systems, refrigerant charge verification, and leak detection.
Hydraulic Systems
OEM hydraulic power unit pressure monitoring where EMC compliance and vibration resistance are critical requirements.
Ordering Guide
| Code Position | Options |
|---|---|
| Pressure Type | G = Gauge (default); A = Absolute |
| Range | Specify: 0–X kPa or 0–X MPa (up to 60 MPa) |
| Accuracy Code | 1 = ±0.4% FS; 2 = ±0.25% FS |
| Output Code | A1 = 4–20 mA; V1 = 1–5 V DC; V2 = 0–5 V DC; V3 = 0.5–4.5 V DC |
| Connection Code | F1 = M20×1.5; F2 = G1/4; F4 = 1/2-20 UNF-2A; F0 = Special |
| Cable Code | W1 = φ26 cable IP67; W2 = φ26 plug IP65; W3 = φ38 cable IP67; W4 = φ38 plug IP65; W5 = φ35 cable IP67; W6 = φ38 plug IP65 |
| Options | E = Ex ia II CT5 intrinsic safety |
Example Order Code: HM23 (0–1.6 MPa) — 1 — A1 — F1 — W2 = HVAC/R transmitter, 0–1.6 MPa gauge, ±0.4% FS, 4–20 mA, M20×1.5 thread, φ26 plug IP65
Frequently Asked Questions
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Need an HVAC/R Pressure Transmitter?
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