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H1QP Pressure Sensor Datasheet


Digital pressure transducer H1QP is a pressure sensor, which is primarily used to measure pressure in distribution pipes of gases with analog or digital output interfaces.


Pressure manometer H1QP is designed for precision measurement of overpressure, under-pressure or absolute pressure of gases or liquids inside distribution piping. The main measurement body is made from stainless steel, so any medium can be measured, which does not react with stainless steel type DIN 1.4301, also known as AISI 304 also known as X5CrNi18 10.


In manometer, the pressure the medium creates pushes on the mechanical membrane and changes electrical properties of the output signal, which is then electronically amplified and converted to digital numerical form. This digital information is available ad digital-to-analog signal - for example 4-20mA output - or digital interface over for example RS485 and MODBUS protocol.

Mechanical information

The transducer is enclosed in a robust stainless steel enclosure.

Technical parameters

Type of measurement absolute pressure, overpressure, under-pressure
Maximum measurement range 0 - 60MPa
Temperature of measured medium min. -40°C, max. +125°C
Measurement precision 0,1% of measured range for pressures more or equal to 25kPa
0,25% of measured range for all pressure ranges
this combined precision accounts for non-linearity of measurement, hysteresis and repeatability
Additional measurement error due to ambient temperature less than 0,03 %/10°C in the range of 0 to +60°C
less than 0,03 %/10°C in the range of -20 to +60°C
Long-term precision stability additional error of less than 0,15% of range per year
Recommended calibration frequency once every two years
Power supply 3.3V DC or 5V DC or 12V DC supply
Physical communication interface RS485 or UART or 4-20mA analog output
Process attachment M20x1,5; G½; G¼; other - see ordering table below
Material of process attachment DIN 1.4301 (AISI 304 / X5CrNi18 10) stainless steel
Isolation resistance at 500V RIZ > 2 M Ohm
IP protection grade according to (IEC 60 529) EN 60 529 IP 68

Weight and dimensions


Dimensions in [mm]


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Information included on the label:

  • Manufacturer
  • Unit order code
  • Measurement range and measurement precision
  • Serial number
  • IP rating

How to order

Order shall contain the following information:

  • Date and internal number of the order
  • Name and address (including VAT number where appropriate)
  • Order number assembled from order tables including number of units and requested delivery date
  • Type of delivery
  • Optional extras to include (for example high pressure shock damping filter)

Order codes table


For all pressures up to 40 MPa: Short-term overload pressure of the sensors is double of its measurement range. Burst pressure is tripple of the measurement range. Pressures above overload pressure may cause sensor damage. Pressures above burst pressure may pose health risk to operators and equipment.

For all pressures above 40 MPa: Short-term overload pressure of the sensors is 1.5-times its measurement range. Burst pressure is double of the measurement range. Pressures above overload pressure may cause sensor damage. Pressures above burst pressure may pose health risk to operators and equipment.

Example: 0-60 MPa sensors max measurement range: 0-60 MPa. Short-term overload pressure: 90 MPa. Burst pressure: 120 MPa.

Measurement range (M)
M00 - 2.5 kPa
M10 - 4 kPa
M20 - 6 kPa
M30 - 10 kPa
M40 - 16 kPa
M50 - 25 kPa
M60 - 40 kPa
M70 - 60 kPa
M80 - 100 kPa
M90 - 160 kPa
M100 - 250 kPa
M110 - 400 kPa
M120 - 600 kPa
M130 - 1 MPa
M140 - 1.6 MPa
M150 - 2 MPa
M160 - 2.5 MPa
M170 - 2.8 MPa
M180 - 4 MPa
M190 - 6 MPa
M200 - 10 MPa
M210 - 16 MPa
M220 - 25 MPa
M230 - 40 MPa
M240 - 60 MPa
M2580 - 520 kPa
M26-1 to 0 kPa
M27-100 - 0 kPa
M28-100 - 100 kPa
M29barometric pressure
MXspecial - on request
Communication interface (R)
R1RS-485 (TIA-485(-A) / EIA-485) with MODBUS
R24-20mA analog output
R3USB 1.x (Win, Linux, MacOS drivers) with MODBUS
RXspecial - on request
Connector type (A)
A0Valve connector DIN 43650-A (IP65)
A1Hirschmann CA3GS (IP67)
A2Hirschmann CA6GS (IP67)
A3Sealed cable 5m long (IP68)
A4Sealed cable 10m long (IP68)
A5Sealed cable 20m long (IP68)
A6Sealed cable 40m long (IP68)
A7Sealed cable 80m long (IP68)
AXspecial - on request
Power supply type (C)
C03.3V DC (1W)
C15V DC (1W)
C212V DC (1W)
CXspecial - on request
Measurement precision (P)
PXspecial - on request
Measured pressure type (T)
T0absolute pressure against vacuum
T1underpressure / overpressure against atmospheric pressure
TXspecial - on request
Max ambient temperature range (W)
W0-20°C to +60°C
W10°C to +60°C
WXspecial - on request
Mounting thread (H)
H1G1/2 (BSP-BSPP, ISO 228, DIN 259, BS2776, JIS B0202 (PS))
H2G1/4 (BSP-BSPP, ISO 228, DIN 259, BS2776, JIS B0202 (PS))
H3NPT 1/2
H4clamp type (no threading)
H5wall installation bracket
H6NPT 1/4
HXspecial - on request
Type of measurement nozzle (N)
N0standard (with raised nozzle) (EN 837)
N1clamp (DIN 32676) size 32 (ID of pipe) - material: DIN 1.4301 (US/BS 304)
N2barometric pressure measurement attachment
NXspecial - on request
Example order code: H1QP-M0-R1-A1-C1-P2-T0-W1-H0-N0
Measurement range (M0): 0-2.5 kPa
Uplink radio type (R1): RS485 with MODBUS
Connector type (A1): Hirschmann CA3GS (IP67)
Power supply (C1): 5V DC
Measurement precision (P2): 0.4%
Type of measurement (T0): absolute pressure against vacuum
Max ambient temperature (W1): 0C to +60C
Mounting thread (H0): M20x1.5
Type of measurement nozzle (N0): standard (EN 837) (with raised nozzle)


Sensors are packed individually into padded cartons.

The packaging includes all information required for proper use and servicing of the equipment.

Physical installation

The manometer is screwed on to the measurement place with appropriate spanner (24mm). The inner thread type on the measurement place and on the manometer must match! Tightness of the connection is ensured by appropriate gasket - not part of the delivery. The body of the manometer must not be used for tightening of the manometer onto the measured place. Always use spanner and dedicated mounting nut.

Hirschmann CA6LS (7pin) connector (A2)

RS485 (R1)

Pin number Function Notes
1 VCC Power supply to sensor - keep powered for autonomous measurements and archiving
3 RS485: A
4 RS485: B
5 keep not connected
6 WAKEUP Pulling low (to GND) wakes up the sensor for communication. Permanently wire to GND to disable sleep.
7 keep not connected


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