WIKA DPGT43 Differential Pressure Gauge with Output Signal

Overview

The WIKA DPGT43 differential pressure gauge with output signal, marketed as the intelliGAUGE®, is a dual-function instrument that provides simultaneous local mechanical indication and a proportional 4…20 mA electrical output signal from a single, compact all-metal body. Built on WIKA’s proven model 732.51 stainless steel differential pressure gauge platform, the DPGT43 is manufactured in accordance with EN 837-3 and is intended for process industry applications where both an easy-to-read on-site display and remote signal transmission to a control room are required from the same measuring point.

For plant operators across Oman and the wider GCC region managing utility, process, and safety-related differential pressure measuring points, the DPGT43 eliminates the need for a separate transmitter and local gauge, reducing installation cost and the number of process connections required. Seven Star LLC supplies the WIKA DPGT43 intelliGAUGE to customers in Muscat, Sohar, Salalah, and across the Sultanate of Oman as a WIKA supplier, providing instruments with manufacturer documentation and technical support.

Measurement and Operating Principle

The DPGT43 uses a robust diaphragm measuring system in which differential pressure produces a pointer rotation proportional to the applied pressure, in the same manner as a conventional mechanical differential pressure gauge. What distinguishes the DPGT43 is the addition of a non-contact electronic angle encoder – technology proven in safety-critical automotive applications – which determines the exact position of the pointer shaft without any physical contact, eliminating wear and friction over the life of the instrument.

From this angle measurement, the gauge generates a proportional electrical output signal, typically 4…20 mA transmitted per NAMUR recommendations, though 0…20 mA and 0…10 V options are also available. The measuring span of the electrical signal is factory-adjusted automatically to align with the mechanical display, so that the full scale of the analogue dial corresponds precisely to the 4…20 mA range, with the electrical zero point available for manual field adjustment. Because the mechanical display operates independently of any external power source, the gauge remains fully readable during a power failure, an important safety consideration for critical measuring points.

Engineering Design of the WIKA DPGT43

The DPGT43 is constructed from highly corrosion-resistant stainless steel with an all-metal sealing of the media chamber, eliminating the need for elastomer sealing elements and delivering superior long-term leak tightness compared to gauges relying on rubber or polymer seals. The all-metal construction combined with the close-fitting design of the pressure element also provides high overload safety, allowing the DPGT43 to withstand static pressures and overpressure events that would damage lighter-duty instruments.

The gauge is available with nominal dial sizes of 100 mm and 160 mm for clear on-site readability, and covers differential pressure measuring ranges starting from as low as 0…16 mbar, extending to higher ranges suited to a wide variety of process applications. Individual, non-linear characteristic curves – such as x² or √x scaling – are available for flow measurement applications where the differential pressure signal must be linearized to represent flow rate directly. No configuration is necessary at the point of installation thanks to the instrument’s plug-and-play design, reducing commissioning time significantly.

Key Features

• Combined mechanical display and 4…20 mA electrical output in a single all-metal instrument
• Non-contact electronic angle encoder for wear-free, friction-free signal generation
• All-metal media chamber sealing eliminates elastomer seals for superior leak tightness
• Nominal dial sizes of 100 mm and 160 mm
• Differential pressure ranges from 0…16 mbar upward
• Plug-and-play design requiring no field configuration
• Optional non-linear x² / √x characteristic curves for flow applications
• Mechanical display remains readable during power outages

Industrial Applications

The WIKA DPGT43 is widely used across process plants, utility stations, and safety-related measuring points where both local visual confirmation and remote signal transmission are required from the same differential pressure tapping. Typical applications include filter monitoring, pump and compressor differential pressure checks, flow measurement via orifice plates or venturi elements using the non-linear characteristic curve option, and tank or vessel differential level applications.

In Oman’s process, utilities, and industrial sectors, including facilities supporting the Sohar and Salalah economic zones, the DPGT43 offers plant engineers a space-saving solution that combines two measuring functions into one process connection. As a trusted supplier of WIKA products, Seven Star LLC assists customers throughout the Sultanate of Oman with instrument selection, range specification, and after-sales support for the DPGT43 and the wider WIKA differential pressure gauge range.

Technical Specifications

Accuracy Classes and Electrical Loop Design

The mechanical indication of the WIKA DPGT43 is supplied in accuracy class 1.6 as standard, with class 1.0 and class 2.5 also available, all rated to EN 837-3; the electrical output signal is specified at ±1% of the measuring span with a linearity error of no more than 1%. Four output variants are offered: 4…20 mA two-wire passive, a 4…20 mA version for hazardous areas, 0…20 mA three-wire and 0…10 V three-wire. For the standard two-wire variant the supply is DC greater than 12 V and up to 30 V, with the permissible loop burden given by (supply voltage − 12 V) / 0.02 A to a maximum of 600 Ω — a figure worth checking against barrier and marshalling cabinet resistance before commissioning. Electrical termination is by a PA 6 cable socket with M20 × 1.5 gland and screw terminals, and an intrinsically safe ATEX version to II 2G Ex ia IIC is available.

Materials, Connections and Environmental Limits

Wetted parts of the WIKA DPGT43 are stainless steel 1.4571 (316Ti), with NiCr alloy used on higher measuring spans; the case is stainless steel 1.4301 or 1.4571, the window laminated safety glass or polycarbonate, and the dial aluminium. Process connections are two G ¼ female or two G ½ B male threads to EN 837-3, with ANSI NPT alternatives, plus optional stainless steel throttle screws of 0.6 mm or 0.3 mm bore to damp pulsating media. Permissible medium temperature is −20 to +100°C, extending to +120°C or +150°C on higher-rated versions, with ambient limits of −20 to +60°C or −40 to +60°C. Ingress protection is IP54, IP65 or IP66 to IEC/EN 60529, and instrument weight runs from roughly 1.9 to 3.4 kg depending on nominal size and span. The gauge conforms to ASME B40.100 alongside EN 837-3 and DIN 16003.

Order Your WIKA DPGT43 Today

Contact Seven Star LLC to request a quotation, datasheet, or technical consultation for the WIKA DPGT43 differential pressure gauge with output signal. As a WIKA supplier serving Muscat, Sohar, Salalah, and the greater Sultanate of Oman, Seven Star LLC supplies WIKA instrumentation with manufacturer documentation and dedicated technical support for process and safety-related measuring applications across the GCC.

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