Pressure Sensor - Industrial - Type KHC | Gefran | Philippopoulos s.a.
Pressure Sensor - Industrial - Type KHC | Gefran | Philippopoulos s.a.

Pressure Sensor - Industrial - Type KHC | Gefran

Gefran KH Pressure Transmitter

The Gefran KH is an industrial pressure transmitter designed for hydraulic systems, mobile hydraulics, and machinery subject to vibration, pressure spikes, and thermal cycling. The sensing element utilizes thick film technology on a stainless steel measuring diaphragm. Wetted parts are stainless steel, compatible with AISI 430F and 17-4 PH.

Technical Specifications

  • Pressure ranges: 4 to 1000 bar
  • Reference temperature accuracy: < ±0.5% FS
  • Output signals: 4–20 mA (2-wire), 0–10 Vdc (3-wire), 0.5–4.5 V ratiometric
  • Response time (10–90% FS): < 1 ms
  • Process temperature: -40 to +125 °C
  • Ambient temperature: -40 to +105 °C
  • Ingress protection: IP65 / IP67 (M12 version with suitable female connector)

Applications

Commonly used in hydraulic presses, power packs, pump assemblies, agricultural and construction machinery, test benches, and systems requiring continuous analog pressure feedback to PLCs, safety controllers, or data loggers.

Output Selection

4–20 mA output is recommended for long cable runs and environments with electrical noise. Voltage outputs are suitable for short-distance connections to PLC analog inputs. The 0.5–4.5 V ratiometric output is intended for mobile applications with 5 V supply.

Installation and Maintenance

The sensor should be grounded via the machine body and connected with shielded cable. Shielding is typically grounded at the PLC side and left open at the machine side, per installation manual. No actuators or adjustable parts are present; maintenance is limited to checking connection tightness, wiring, mechanical stress, and signal deviation.

Standards and Certifications

KH series is available with SIL 2 for overpressure monitoring per IEC/EN 62061. Product documentation also lists rail approval per EN 50155.

FAQ

Which media are compatible?
Suitable for liquids and gases compatible with AISI 430F and 17-4 PH stainless steel.

When is 4–20 mA output selected?
For longer cable runs or environments with electromagnetic interference.

Is it suitable for safety applications?
Yes, when properly integrated into SRP/CS for overpressure detection and manual limitations are observed.

Datasheet and documents

Description

Technical specifications

Overview

KHC pressure transmitters are based on film sensing element deposited on stainless steel diaphragm.

Thanks to the latest state of the art SMD electronics and compact all stainless steel construction, this products are extremely robust and reliable, specially suitable for mobile hydraulics applications.

In particular the KHC series combines high accuracy with temperature stability, resistance to extreme environmental conditions and CAN digital output with mobile hydraulics typical protocols.

Developed to ensure a robust and high-performance solution for applications such as agricultural machines, contruction machines and material handling equipments.

The digital signal, in addition to the pressure measurement, also contains the data related to the temperature of the device.

The instrument is delivered preconfigured and ready to be used without any further effort. Custom configurations are also possible, to be specified on order, or programmable by the user.

Description

  • J1939 and CANOpen digital signal output
  • All stainless steel construction
  • Pressure ranges up to 1000 bar

Certifications

EU Conformity Declaration - KHC (PDF)

UK Conformity Declaration - KHC (PDF)