Hydac HPT 146K-G-4000-000 OEM Pressure Transmitter, 1 to 5 V

A voltage-output OEM transmitter for series machine builds

The Hydac HPT 146K-G-4000-000(PSI) (HYDAC part number 928965) belongs to the HPT 1400 series, which HYDAC describes as a robust thin-film transmitter for series applications. All wetted parts are welded stainless steel with no seal inside the sensor, and the unit weighs only 0.1 lb. This version measures 0 to 4000 psi, gives a 1 to 5 V output from an 8 to 36 V supply, has an SAE 4 male port and a Deutsch DT04-3P plug.

The 1 to 5 V signal and the Deutsch plug make it a common fit for mobile machine controllers that read analog voltage inputs.

Technical specifications

Order code and options

HPT 146K-G-4000-000(PSI): HPT is the series, the digits 146K select the port and plug combination as listed in the catalogue, G the signal option shown here as 1 to 5 V, 4000 the range in psi and 000 the standard modification. The datasheet says the HPT 1400 is available from 0 to 16 bar up to 0 to 600 bar, with many integrated plug types and cable options, so confirm the exact digits against the datasheet.

Choosing between voltage and current outputs

A voltage output is simple to wire over short runs, but long cables pick up noise and lose accuracy, so use shielded cable and keep the supply clean. The residual ripple limit is 5 percent and current consumption is up to 25 mA. If the controller is far from the sensor, a 4 to 20 mA variant such as the HDA 8400 is usually the safer choice. Reverse polarity, overvoltage and short circuit protection are built in.

Fit a mating Deutsch socket with the right terminals and seals, as the plug rating depends on a correctly crimped, fully latched connector. State the ratiometric version in the enquiry if your controller needs it, because the E13 approval numbers in the datasheet list a separate number for ratiometric units.

If you replace an existing sensor, check the supply: this series accepts 8 to 36 V DC, which covers 12 V and 24 V vehicle systems. Check the pin assignment, with pin 1 as supply, pin 2 as signal and pin 3 as zero volts, before powering the circuit, since a miswired plug may damage the controller input.

Documents and quotation

The HPT 1400 OEM datasheet (EN 18.137.0) is linked at the end of this page. Please give the complete code, connector and quantity. See also our pressure instrumentation range.

How the HPT 146K-G-4000-000(PSI) works

Like most HYDAC pressure transmitter series, the HPT 1400 is built on a robust, long-life thin-film sensor. A strain gauge bridge is deposited directly onto a stainless steel measuring diaphragm. System pressure deflects the diaphragm slightly, the bridge resistance changes in proportion, and the integrated electronics amplify and linearise this into a voltage output. On the HPT 146K-G-4000-000(PSI) the result is a 1 to 5 V signal across the 0 to 4000 psi range, so a reading of 1 V means zero pressure and 5 V means full scale. The live zero at 1 V lets a controller detect a broken wire or a missing supply, because a healthy sensor never sends 0 V.

Because the sensor and the pressure port are welded together, there are no internal seals that could age or leak. An orifice in the pressure port helps damp pressure peaks before they reach the measuring cell.

HPT 1400 series data from datasheet EN 18.137.0

Selection & ordering guide

• Range: pick a range where normal working pressure sits in the upper part of the scale while pressure peaks stay below the overload rating.
• Output: the series offers 4 – 20 mA, 0 – 5 V, 1 – 6 V, 0 – 10 V and ratiometric 0.5 – 4.5 V at 5 V supply, plus other signals on request. Match the signal to the controller input card.
• Port: the datasheet shows G1/4 A ISO 1179-2, M14 × 1.5 and SAE 6 (9/16–18 UNF 2A) among others; this model uses the SAE 4 (7/16–20 UNF) port.
• Plug: Deutsch DT04 2- or 3-pole, DIN 72585 3-pole, Superseal 3-pole and cable versions are shown.
• Quantities: HYDAC states the HPT 1000/1400 OEM family is offered for minimum order quantities of 500 pieces per type, so confirm availability for single units of a given code.

Our team can help confirm the correct ordering code for the HPT 146K-G-4000-000(PSI) or suggest an equivalent HYDAC transmitter when a direct replacement is needed.

Installation & maintenance

• Fit the transmitter on a clean, undamaged port face with the correct FKM O-ring; the datasheet gives a recommended tightening torque of 20 N·m.
• Mount the sensor where trapped air can escape, and avoid locations directly beside fast-switching valves where spikes are highest.
• Use a correctly crimped, fully latched Deutsch mating connector; the IP rating applies only with the mating connector fitted.
• Route the signal cable away from high-current lines and use shielded cable for longer runs.
• Check the zero signal (1 V) periodically with the system depressurised and compare it with a reference gauge during routine service.

Typical applications in Oman & the GCC

HYDAC developed the HPT 1400 specifically for the OEM market, for example mobile machines with very limited space. In Oman and the GCC the HPT 146K-G-4000-000(PSI) suits pressure feedback on mobile cranes, construction and mining equipment, agricultural machines, municipal and utility vehicles, and compact hydraulic power units, where vibration, heat, dust and wash-down are daily conditions.

Why source the HPT 146K-G-4000-000(PSI) from Seven Star LLC

Seven Star LLC supplies HYDAC pressure transmitters across Oman and the GCC. Send the full model code, pressure range, port, connector and quantity to request a quote, and our team can help confirm the correct ordering code.