HIGH-TEMPERATURE PRESSURE MEASUREMENT
HM80 High-Temperature Pressure Transmitter
Heat-pipe cooled sensing element for extreme temperatures with ±0.25% FS accuracy. Measurement range from -100kPa to 200MPa. Medium temp up to +350°C. Four output options: 4-20mA, 1-5V, 0-5V, 0.5-4.5V. Heat-pipe cooling technology. M20×1.5 or G1/4 connections. IP65. IP67 cable or IP65 connector.
Product Overview
The HM80 is engineered for extreme high-temperature environments up to +350°C medium temperature, utilizing advanced heat-pipe cooling technology and high-temperature resistant sensing elements to deliver reliable ±0.25%FS accuracy across -100kPa to 200MPa.
Four output options (4-20mA, 1-5V, 0-5V, 0.5-4.5V) with M20×1.5 or G1/4 process connections. The integrated heat-pipe passively cools the sensing element without external power or cooling fluid, maintaining accuracy even at +350°C.
Weighing approximately 1.2kg with robust 316L stainless steel construction, the HM80 withstands thermal cycling, vibration, and harsh industrial conditions throughout its ≥50 million cycle service life.
Technical Specifications
| Parameter | Specification |
|---|---|
| Sensing Technology | Diffused silicon piezoresistive (heat-pipe cooled) |
| Measurement Range | -100kPa ~ 0 ~ 5kPa … 200MPa |
| Pressure Type | Gauge or Absolute |
| Overall Accuracy | ±0.25%FS (typical) | ±0.4%FS (max) |
| Long-Term Stability | ±0.15%FS/year (typical) | ±0.25%FS/year (max) |
| Thermal Hysteresis | ±0.1% FS (typical) |
| Zero Temp Coefficient | ±0.03%FS/°C (typical) | ±0.05%FS/°C (max) |
| Span Temp Coefficient | ±0.03%FS/°C (typical) | ±0.05%FS/°C (max) |
| Signal Output | 4-20mA (2-wire) | 1-5V DC | 0-5V DC | 0.5-4.5V DC |
| Supply Voltage | 12–36 V DC (24 V DC typical) |
| Load Resistance | ≤ (V_supply − 12) / 0.02 Ω |
| Response Time | ≤ 2 ms |
| Resolution | 1/100,000 of FS |
| Medium Temperature | -40°C to +350°C (with heat-pipe cooling) |
| Ambient/Operating Temperature | -20°C to +80°C |
| Compensated Temperature | -10 to +60°C (14 to +140°F) |
| Overload Pressure | 2× rated range (1.1× for 100 MPa range) |
| Vibration Error | ≤ ±0.01% FS (axes X, Y, Z at 200 Hz/g) |
| Sensor Membrane | 316L Stainless Steel |
| Port & Enclosure Material | 1Cr18Ni9Ti Stainless Steel (housing), Cast aluminum (enclosure) |
| Sealing Material | NBR, PTFE, or Fluorubber (application dependent) |
| Process Connection | M20×1.5 (F1) | G1/4 (F2) | 1/4 NPT (F3) | 1/2-20 UNF (F4) | Special (F0) |
| Electrical Connection | Cable type (W1, IP67) | Plug/Socket type (W2, IP65) |
| Protection Grade | IP65 (plug type) | IP67 (cable type) |
| Weight | Approx. 1.2 kg |
| Temperature Rating Options | T1: ≤150°C | T2: ≤250°C | T3: ≤350°C |
| EMC Reference Standards | EN 50081-1, EN 50082-2, IEC 61000-4-3 |
Key Features
Extreme Temperature Capability
Operates reliably with medium temperatures up to +350°C using advanced heat-pipe cooling technology. No external cooling systems required, reducing installation complexity and maintenance costs.
Advanced Cooling Technology
Integrated heat-pipe heat dissipation system efficiently transfers heat away from the sensing element. Maintains sensor accuracy and extends service life even in continuous high-temperature operation.
Robust Industrial Construction
316L stainless steel wetted parts with high-temperature seals and reinforced diaphragm design. Built to withstand thermal cycling, vibration, and harsh industrial conditions.
Wide Pressure Range
Covers an extensive range from -100kPa vacuum to 200MPa high pressure. Overload protection at 2×FS (1.5×FS for ranges ≥100MPa) ensures sensor longevity.
Thermal Cycling Resistance
Designed for repeated thermal cycling between ambient and +350°C. High-temperature seals and reinforced diaphragm construction withstand thermal expansion over ≥50 million cycles.
Passive Cooling System
The heat-pipe uses phase-change cooling requiring no external power or cooling fluid. Maintenance-free passive system for continuous high-temperature operation.
Applications
Steam Systems
Superheated steam pressure monitoring in power plants, industrial boilers, and steam distribution networks up to +350°C.
Petrochemical Refining
Catalytic cracking, thermal processing, and high-temperature reactor pressure monitoring in refineries.
Metal Smelting & Casting
Hydraulic press systems, molten metal processing, and furnace pressure control in metallurgical operations.
Plastics & Rubber Processing
Injection molding, extrusion systems, and vulcanization process pressure monitoring at elevated temperatures.
Thermal Power Generation
Turbine inlet pressure, boiler drum monitoring, and high-temperature process control in thermal power plants.
Heat Transfer Systems
Thermal oil systems, heat exchangers, and high-temperature process fluid pressure measurement.
Dimensions
The HM80 features an elongated body with integrated heat-pipe cooling fins. Dimensions vary by temperature rating (T1/T2/T3). All measurements in mm.
Process Connection Options
| Code | Connection | Description |
|---|---|---|
| F1 | M20×1.5 | Metric standard |
| F2 | G1/4 (BSP) | British standard pipe |
| F3 | 1/4 NPT | US standard pipe |
| F4 | 1/2-20 UNF | SAE/hydraulic |
| F0 | Special | Contact for custom options |
Electrical Wiring
The HM80 uses color-coded wiring for all signal outputs. Connection method depends on the selected output type.
4-20mA Output (2-Wire System)
The 4-20mA current loop requires only two wires. The transmitter is powered through the signal loop — no separate power wiring needed. Supply voltage: 12-36V DC. Maximum loop resistance (including cable): ≤ (Supply Voltage – 12V) / 0.02A.
Voltage Output (3-Wire System)
Voltage outputs (1-5V, 0-5V, 0.5-4.5V) use three wires: power supply (+), signal output, and common ground. Supply voltage: 12-36V DC. The output signal is referenced to the ground wire.
Ordering Guide
Model code structure: HM80 [G/A] – [Range] – [Accuracy] – [Output] – [Thread] – [Cable] – [Temp Rating]
| Position | Code | Description |
|---|---|---|
| Model | HM80 | High-Temperature Pressure Transmitter |
| Pressure Type | G | A | Gauge (G, may be omitted) | Absolute (A) |
| Range | (0~X kPa) or (0~X MPa) | e.g. 0~100kPa, 0~1.6MPa, 0~60MPa |
| Accuracy | 1 | 2 | 1 = ±0.4% FS | 2 = ±0.25% FS |
| Output Signal | A1 | V1 | V2 | V3 | 4-20mA | 1-5V DC | 0-5V DC | 0.5-4.5V DC |
| Process Connection | F1 | F2 | F3 | F4 | F0 | M20×1.5 | G1/4 | 1/4NPT | 1/2-20UNF | Special |
| Electrical | W1 | W2 | Cable type (IP67) | Plug/Socket type (IP65) |
| Display | L1 | L2 | LCD display | LED display |
| Options | P | E | Flush diaphragm | Ex ia II CT5 explosion-proof |
Example: HM80 (0~1.6MPa) — 2 — A1 — F1 — W1 = HM80, 0–1.6 MPa gauge, ±0.25% FS accuracy, 4-20mA output, M20×1.5 process connection, cable type IP67.
Frequently Asked Questions
Need a High Temperature Pressure Solution?
Whether you need a single transmitter for a high-temperature pipeline or a fleet of sensors for a steam system, our engineering team can help you select the right HM80 configuration for your demanding thermal environment.
Our engineers typically respond within 12 business hours with detailed technical specifications and pricing.