HM3051 Smart Differential Pressure Transmitter
Precision pressure measurement with HART protocol intelligence and ±0.1% accuracy. Trusted by oil & gas, chemical, and power industries worldwide.
Product Overview
The HM3051 is an intelligent smart differential pressure transmitter utilizing advanced micro-processor technology with A/D and D/A conversion capabilities. Featuring HART protocol communication for digital data exchange, the HM3051 combines proven capacitor-type sensing elements with signal linearization, temperature compensation, and engineering unit conversion for maximum measurement accuracy and reliability.
Key Capabilities: Signal linearization and temperature compensation • E2PROM non-volatile parameter storage • HART protocol (BELL 202 FSK at 1200Hz/2200Hz) overlapped on 4-20mA signal • Externally adjustable zero and span • Wide range of process connections • Multiple material options for harsh environments.
The HM3051 supports a wide measuring range from 0~0.125 KPa to 40 MPa with multiple accuracy options (±0.1%FS, ±0.25%FS, or ±0.5%FS). Available in both standard 4-20mA output and HART digital communication variants, the HM3051 is certified for explosion-proof (Type d II BT4) and intrinsically safe (II CT6) applications.
Technical Specifications
| Parameter | Specification |
| Measuring Medium | Liquid, gas, or vapor |
| Measuring Range | 0~0.125 KPa to 40 MPa (10 range options) |
| Signal Output | 4–20mA, or 4–20mA with HART protocol |
| Power Supply | 12–45V DC (24V DC standard) |
| Maximum Load | RL ≤ 50(VX−12)Ω |
| Accuracy | ±0.1%FS, ±0.25%FS, or ±0.5%FS |
| Dead Zone | None (≤0.1% FS) |
| Operating Temperature | Amplifier: −29~+93°C; Element: −40~+104°C (−40~+150°C standard oil, +15~+315°C high-temp) |
| Static Pressure Rating | 4, 10, 25, or 32 MPa |
| Humidity Range | 0–100% RH |
| Volume Intake | <0.12 cm³ |
| Damping | 0.2s to 1.67s (continuously adjustable) |
| Stability | Not exceeding basic tolerance within 6 months |
| Temperature Influence | Zero: ±0.1%/55°C; Total: ±0.2%/55°C |
| Power Supply Influence | <0.005%/V |
| Process Connection | 1/4″–18NPT (vessel), 1/2″–14NPT (leading joint) |
| Signal Cable | G1/2″ |
| Weight | ~3.5 kg |
| Certifications | Type d II BT4 (explosion-proof), II CT6 (intrinsically safe) |
Key Features & Benefits
HART Digital Communication
Integrated HART protocol for two-way communication, advanced diagnostics, and remote configuration without disrupting the 4-20mA signal.
High Accuracy (±0.1% FS)
Three accuracy options available with high-performance ±0.1%FS, linearization, and temperature compensation for precise measurement in critical applications.
Wide Range Capability
10 range options spanning 0–0.125 KPa to 0–40 MPa, enabling deployment across diverse pressure measurement scenarios from ultra-low to ultra-high pressures.
Explosion-Proof Certified
Type d II BT4 explosion-proof and II CT6 intrinsically safe certifications for deployment in hazardous Zone 1 and Zone 2 environments.
Robust Material Options
316L stainless steel, Hastelloy C-276, Monel, and tantalum wetted parts available to handle corrosive media in chemical and offshore applications.
E2PROM Parameter Storage
Non-volatile E2PROM memory retains all calibration and configuration parameters during power loss, ensuring reliable operation without reconfiguration after outages.
Industrial Applications
Oil & Gas Processing
Flow measurement, wellhead monitoring, separator level control, and pipeline pressure monitoring in upstream and downstream operations.
Chemical Plants
Reactor pressure monitoring, distillation column differential pressure, filter monitoring, and corrosive media measurement with Hastelloy wetted parts.
Power Generation
Boiler drum level, steam flow measurement, turbine lubrication monitoring, and condenser vacuum measurement in thermal and nuclear plants.
Water & Wastewater
Filter differential pressure, pump station monitoring, open channel flow measurement, and water distribution pressure management.
Pulp & Paper
Digester pressure, stock consistency measurement, headbox DP control, and steam system monitoring throughout the pulping and papermaking process.
Food & Beverage
CIP system monitoring, tank level measurement, pasteurization pressure control, and hygienic process monitoring with sanitary connections.
Ordering Guide
Measuring Range Options
| Range Code | Measuring Range | Static Pressure |
|---|---|---|
| 1 | 0~0.125 KPa | 4 MPa |
| 2 | 0~1.5 KPa | 4 MPa |
| 3 | 0~7.5 KPa | 4 MPa |
| 4 | 0~50 KPa | 10 MPa |
| 5 | 0~350 KPa | 25 MPa |
| 6 | 0~3.5 MPa | 25 MPa |
| 7 | 0~21 MPa | 32 MPa |
| 8 | 0~40 MPa | 32 MPa |
Output & Communication Options
| Code | Output Signal |
|---|---|
| E | 4~20mA (two-wire) |
| S | 4~20mA + HART protocol |
Accuracy Options
| Code | Accuracy Class |
|---|---|
| Q1 | ±0.1% FS |
| Q2 | ±0.25% FS |
| Q3 | ±0.5% FS |
Frequently Asked Questions
Need a Smart Differential Pressure Solution?
Our process instrumentation engineers can help you select the right HM3051 configuration for your differential pressure measurement application, including range selection, material compatibility, and HART communication setup.
Our engineers typically respond within 12 business hours with detailed technical specifications and pricing.