HPTM SERIES · DUAL OUTPUT

HPTM189 Integrated Temperature & Pressure Transmitter

Independent measurement of process pressure and temperature in a single transmitter. Pressure accuracy ±0.5% FS (±0.2% FS option), temperature accuracy ±0.5°C from -40 to 200°C. Pressure ranges to 40 MPa gauge or 10 MPa absolute. Front-mounted PT100/PT1000 element gives smaller ΔT vs. traditional pocket-mounted thermometers.

±0.5% FS Pressure ±0.5°C Temperature 0–50 kPa to 40 MPa -40 to 350°C Modbus · 4-20 mA · 0-10 V IP65 / IP66 / IP67 304 / 316L Wetted
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HPTM189 Integrated Temperature & Pressure Transmitter

Product Overview

The HPTM189 combines a high-stability piezoresistive silicon pressure sensor with a precision PT100 or PT1000 RTD element in a single compact transmitter housing. Both signals are conditioned independently and output through standard industrial protocols, so a single instrument and one cable run can deliver pressure and temperature data to the same DCS or PLC channel.

The temperature element sits at the front of the housing, in direct proximity to the process media. Compared with traditional pocket-mounted thermometers, the front-mount geometry shortens the heat path, reduces the introduced ΔT, and gives faster step response on changing media. A breathable design on the small-pressure-range models keeps the reference port dry while letting ambient pressure equalise — the result is more stable low-range readings without separate venting.

The HPTM189 is suited to industrial process control applications where one measurement point must report both pressure and temperature accurately — refrigeration loops, hydraulic and pneumatic systems, lab and pilot rigs, and chemical process skids where panel space or cable counts are constrained.

Technical Specifications

ParameterSpecification
Pressure range (gauge)0–50 kPa to 0–40 MPa, intermediate ranges customizable; negative pressure supported
Pressure range (absolute)0–50 kPa to 0–10 MPa, intermediate ranges customizable
Pressure overload2× rated, e.g., 2 MPa range → 4 MPa overload
Temperature range-40 to 200°C standard; -40 to 350°C custom (9-fin, micro-pore housing)
Pressure accuracy±0.5% FS (standard), ±0.2% FS (improved class)
Temperature accuracy±0.5°C (-40°C ≤ media ≤ 200°C); ±1.0°C (200°C < media ≤ 350°C)
Long-term stability±0.25% FS / year
Pressure response time≈ 20–100 ms; warm-up ≤ 5 s
Temperature drift (pressure channel)Zero ±1.5% FS / Span ±1.5% FS over -10 to 70°C compensated band
Output optionsDual 4-20 mA · Dual 0-5 V · Dual 0-10 V · Pressure 4-20 mA + Temperature PT100/PT1000 (3-wire) · 4-wire Modbus-RTU / RS485
Supply voltage10–30 VDC standard; 8.5–30 VDC for 0-5 V; 12–30 VDC for 0-10 V; 3.1–8 VDC battery low-power Modbus mode
Ambient operating-40 to 85°C; storage -40 to 85°C
Media temperature housing5-fin: -40 to 140°C · 9-fin: -40 to 200°C · 9-fin micro-pore: -40 to 350°C
ProtectionIP65 (Hirschmann DIN43650) · IP66 (M12×1) · IP67 (direct cable)
Vibration / Shock20 g (20–5000 Hz) / 50 g (11 ms)
Insulation>20 MΩ @ 500 VDC; dielectric < 2 mA @ 500 VAC for 1 min
Wetted materialsPressure port 304 (S4) or 316L (S6); sensor 316L (M1); O-ring FKM (F1)
Electrical interfaceHirschmann DIN43650, M12×1 (4P / 5P), M12×1 with cable, direct cable
Reverse polarityNo damage; circuit non-functional under reversed wiring
Short-circuit protectionSupported on output

Key Features

Parallel pressure & temperature

Two independent sensing elements, two independent signal-conditioning paths. One process tap and one cable run delivers both measurements without cross-talk between channels.

Class 0.2 pressure option

Standard ±0.5% FS pressure accuracy covers most industrial loops. Specify the improved ±0.2% FS class when the loop is on a regulatory or batch-quality boundary.

Front-mounted RTD element

PT100 or PT1000 sits at the housing tip in direct contact with media. Heat path is shorter and ΔT smaller than pocket-mounted thermometers; step response is correspondingly faster.

Breathable low-range design

Small-range gauge models include a breathing element that equalises ambient pressure on the reference port. Result: stable readings on 0–50 kPa to 0–700 kPa ranges without external venting.

Multiple electrical interfaces

Hirschmann DIN43650, direct cable outlet (IP67), or M12×1 4P / 5P with optional pre-attached cable. Pick the connector that matches the existing panel hardware.

Vibration- and shock-resistant

Mechanical envelope rated to 20 g sinusoidal across 20–5000 Hz and 50 g shock at 11 ms. Suitable for compressor skids, hydraulic stations, and mobile equipment.

Applications

Refrigeration & HVAC

Refrigerant pressure plus suction-line temperature on a single instrument; superheat calculation simplifies, and the loop count drops by half on chiller and rooftop equipment.

Hydraulic stations

Pressure trend and oil temperature share one tap. Oil-warming startup logic and over-temperature trip both pull from the same device.

Pneumatic & compressed air

Discharge pressure plus aftercooler temperature on a compressor skid. Modbus output simplifies wiring on packaged equipment.

Process pilot rigs & R&D

Lab- and pilot-scale skids where panel space is tight and instrument count drives cost. Pressure ±0.2% FS option supports calibration and acceptance testing.

Boiler & steam systems

Steam pressure and superheat temperature in one instrument. Up to 200°C standard, 350°C custom for HP steam and direct-fired heaters.

Battery-powered remote stations

Modbus-RTU low-power mode runs on 3.1–8 VDC battery, suitable for solar-powered well sites and remote pump stations.

Wiring & Electrical Interface

The HPTM189 supports four electrical interface families, each with a published pinout. Match the connector to the existing panel hardware first; signal-output choice (4-20 mA, 0-5 V, 0-10 V, or Modbus) is independent.

Output typeHirschmannDirect cableM12×1-5P
Pressure 4-20 mA + Temperature PT100/PT1000 (3-wire)+V=1, 0V/+OUT=2, A=3 (B routed via cable for RTD)Red=+V, Black=0V, Blue=A, Yellow=B, Green=B1=+V, 3=0V, 2=A, 4=B, 5=B
Dual 4-20 mA (Pressure 2-wire + Temperature 2-wire)+V=1, 0V/+OUT=2, +V_T=3Red=+V_P, Black=0V_P, Yellow=+V_T, Green=0V_T1=+V_P, 3=0V_P, 2=+V_T, 4=0V_T
Dual 0-5 V or 0-10 V (3-wire)+V=1, GND=2, +OUT_P=3 (T routed separately)Red=+V, Black=GND, Yellow=+OUT_P, Green=+OUT_T1=+V, 3=GND, 2=+OUT_P, 4=+OUT_T
4-wire Modbus-RTU / RS485+V=1, -V=2, A=3, B (cable)Red=+V, Black=-V, Yellow=A, Green=B1=+V, 3=-V, 2=A, 4=B

RS485 with 24 V supply adds approximately 25 mm to the housing height. M12×1 wiring shifts to brown / blue / white / black / grey when supplied with pre-attached cable.

Ordering Guide

Model code: HPTM189 – (Range) – [Accuracy] – [Output] – [Connection] – [Electrical] – [Housing] – [Material]

PositionCodeDescription
Pressure rangee.g. 0~10MPaSpecify FS range; gauge or absolute on order
AccuracyA1 / A2A1 = ±0.5% FS standard; A2 = ±0.2% FS improved
Output signalO1 / O2 / O3 / O4 / O5O1 = pressure 4-20 mA + PT100 3-wire; O2 = dual 4-20 mA; O3 = dual 0-5 V; O4 = dual 0-10 V; O5 = Modbus-RTU RS485
ConnectionF0 / F-customStandard tap (M20×1.5, G1/4 or similar). Specify NPT or other custom thread on F0
Electrical interfaceC1 / C1.1 / C2 / C5 / C6C1 = standard Hirschmann; C1.1 = compact Hirschmann; C2 = direct cable IP67; C5 / C6 = M12×1 (5P / 4P)
Housing finsT5 / T9 / T9MT5 = 5-fin (media -40 to 140°C); T9 = 9-fin (-40 to 200°C); T9M = 9-fin micro-pore (-40 to 350°C)
Wetted materialS4 / S6S4 = pressure port 304; S6 = pressure port 316L (sensor 316L; FKM O-ring on both)
Probe extensionoptionalCustom RTD probe extension available for inserting the temperature element into pipe centerline

Example order: HPTM189-(0~10MPa)-A2-O1-F0(G1/4)-C1-T9-S6 (10 MPa range, ±0.2% FS pressure, 4-20 mA + PT100, G 1/4 process port, standard Hirschmann, 9-fin housing, 316L wetted).

HM200H Wireless Temperature & Pressure Transmitter

HM200H Wireless Temp & Pressure Transmitter

LoRa wireless version of the same dual-output concept; battery-powered for remote tank, well, and silo monitoring.

HM26 Ceramic Capacitive Pressure Transmitter

HM26 High-Temp Pressure Transmitter

Pressure-only transmitter for media to 350°C with ceramic capacitive sensing, when integrated temperature output is not required.

HM25 Industrial Pressure Transmitter

HM25 Industrial Pressure Transmitter

HART-compatible field-mount pressure transmitter for general process applications, 0.1% FS accuracy.

FAQ

Both are dual-channel pressure + temperature transmitters. HPTM189 is wired (4-20 mA, 0-5/0-10 V, or Modbus over RS485) and powered from a regulated DC supply. HM200H is wireless via LoRa with internal battery, suitable for remote monitoring without cabling. Choose HPTM189 when the cable run already exists and the host is a DCS or PLC; choose HM200H when the measurement point is far from infrastructure.

Yes. The HPTM189 supports a custom probe-extension structure that places the PT100 / PT1000 element farther into the process media. Specify the desired insertion length when ordering. For pipes above DN50 the extended probe gives a more representative media-temperature reading than the housing-flush configuration.

Modbus-RTU on RS485 with the low-power supply mode (3.1 to 8 VDC). The transmitter can sleep between polls and only wakes when the master requests data, extending battery life by an order of magnitude versus continuous 4-20 mA operation. 4-20 mA loop current alone draws 4 to 20 mA continuously, which is unsuitable for solar-charged or primary-battery stations.

The integrated front element sits in the pressure-measurement port itself, so it reads the same media that the diaphragm sees. ΔT to the actual process is small and the response is fast. A separate thermowell with an RTD inside still works for many applications but adds installation labour, a second tap, and an additional thermal time constant. The HPTM189 is the better choice when one tap is enough and the installation cost matters.

IP65 (Hirschmann DIN43650) suits indoor and sheltered outdoor service; IP66 (M12×1) handles brief direct hose-down; IP67 (direct cable) is needed when the device sees occasional immersion or aggressive washdown. Note that the IP66 and IP67 housings disable the breathable design, so they are not the best choice for very low-range gauge pressure measurements (below 0~50 kPa). Match the protection class to the field environment first, then check the pressure range constraint.

Yes. Standard process taps are M20×1.5 and G 1/4. NPT and other thread families are available as a custom F0 option — specify the desired thread (for example, 1/4 NPT or 1/2 NPT) when placing the order. See our NPT vs BSP/G thread guide if you need to choose a thread family for a multi-region project.

Need a Combined Pressure & Temperature Solution?

Send your application details — range, media, ambient, output type, connector preference — and our pressure team will configure an HPTM189 model code with the correct accuracy class, housing, and wetted material. Custom probe extensions and intermediate ranges are available.

Our engineers typically respond within 12 business hours with detailed technical specifications and pricing.

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