Danfoss 075G0003 DST P110 Pressure Transmitter 0-10 bar

DST P110: a compact OEM transmitter for chillers, heat pumps and transport refrigeration

Danfoss 075G0003 is a DST P110 in the 0 to 10 bar sealed-gauge version with a 4 to 20 mA output. Danfoss Sensor Technology builds this model around MEMS pressure sensing in a welded stainless-steel media interface that is compatible with all refrigerants, with an ARM-based microcontroller that provides diagnostics and stable measurement for OEM installation.

The listed applications are data centres, chillers, transport and commercial refrigeration, variable-speed HVAC equipment, heat pumps and VRF systems. The outline is small and light, only 62 g according to the store entry, which helps when the sensor hangs from a copper line.

Technical specifications

Reading the electrical data

Unlike the plug-in industrial AKS and MBS types, this code uses a round Metri-Pack connector, a sealed automotive-style interface that is common on OEM harnesses. The enclosure rating is IP69K, which allows high-pressure washdown, and the fault signal level of 21.5 mA lets a controller distinguish a sensor failure from a real pressure reading.

A total error band of 3 % inside the compensated range and a response time of 2 ms are the numbers to use for control-loop design. The overload pressure of 40 bar is four times the range, and the data sheet adds a high burst rating against pressure spikes.

Where it fits and what to confirm

This is an OEM device. Harness, mating connector and flare fitting must be chosen to match; the female SAE 45 degree flare 7/16-20 UNF port normally takes a deflator-pin fitting on a refrigeration line. Check the colour code and focus temperature range given in the data sheet, because Danfoss groups the different DST P110 codes by range.

Seven Star LLC is an independent supplier in Muscat. Please send 075G0003 and the quantity to receive a quotation, and confirm the connector and thread against your drawings.

Because this code is an OEM item, the quantity and the harness style matter as much as the sensor itself. Production lines normally order in boxes, and the data sheet lists a pack code beside the single-unit code, so tell us whether you need a single sample for validation or a production quantity. Keep the connector colour and the focus temperature range in your approved parts list to avoid mixing variants.

Before you order 075G0003, compare it with the nameplate of the unit you intend to replace. Photographs of the nameplate help us to confirm the exact code quickly, and we will tell you plainly if a different version of the same family looks like a better fit for your duty.

How the transmitter is used in refrigeration and HVAC control

In chillers, heat pumps and VRF systems the pressure on the suction or discharge side of the refrigerant circuit is one of the main inputs to the controller. A transmitter such as the DST P110 gives the controller a continuous analogue signal it can use to modulate a variable-speed compressor, manage expansion valve control or protect the system when pressure moves outside the expected window. In data centre cooling, where equipment runs continuously and capacity is staged closely to the heat load, a fast and stable pressure signal helps the control logic respond to changes without hunting. In transport and commercial refrigeration the same signal supports defrost decisions and condenser control across a wide range of operating states.

Because the media interface is welded stainless steel and compatible with all refrigerants, the same family can be designed into equipment that uses different refrigerants without changing the sensing principle. The MEMS element and the microcontroller-based diagnostics are what allow the transmitter to report a fault level distinctly from a valid measurement, which the controller software should be written to recognise.

Design-in considerations for OEM equipment

When an OEM selects a transmitter for a new platform, the range should sit comfortably above the highest normal operating pressure of the circuit point being measured while still giving useful resolution at the lower end. The 4 to 20 mA output is well suited to longer cable runs inside a unit and to electrically noisy environments around compressors and inverters, since a current signal is less sensitive to voltage drop than a voltage signal. Engineers should also consider where the transmitter is mounted: hanging it from a copper line is common, so the low weight helps, but the line itself should be supported so vibration from the compressor is not transmitted directly to the sensor body.

Controller input configuration needs to match the transmitter, including the scaling of the range and the handling of the fault signal level. Validating a sample unit on the actual equipment before release to production is good practice, particularly when moving from another sensor type with a different connector or thread.

Operating conditions in Oman and the GCC

Cooling equipment in Oman and the wider GCC works hard for much of the year, with high ambient temperatures, dust and humidity near the coast. Condensing units on rooftops and outdoor plant areas are exposed to direct sun and washdown, which is where the sealed connector and the IP69K enclosure rating are relevant. Installers should route the harness so that water drains away from the connector and so the cable is not trapped against hot refrigerant lines or sharp edges. For transport refrigeration operating between cities and harbours, a sealed automotive-style connection suits the shock and vibration of vehicle-mounted units. Recording the exact code, connector colour and focus temperature range against each equipment model keeps service teams from fitting the wrong variant during maintenance.

Documents and quotation

We attach the Danfoss DST P110 data sheet AI569728714486 as published. See other transmitters in pressure instrumentation.