digital pressure gauge

What a Digital Pressure Gauge Measures

A digital pressure gauge converts pressure at the process connection into an electrical signal and shows the result on an integrated numeric display. This removes the parallax associated with reading a pointer against a dial, but the display resolution is not the same as measurement accuracy. Accuracy still depends on the sensor, selected range, temperature, calibration condition, and installation.

The supplied gauge is a local indication instrument. It shows the pressure at its connection point; it is not automatically a pressure transmitter, data logger, controller, or safety relief device. If a compressor system also needs a 4–20 mA signal, remote monitoring, alarm logic, or automatic shutdown, those functions must be confirmed as separate model or system requirements.

Choose the Gauge Around the Compressor's Operating Conditions

Select a digital pressure gauge from the operating condition outward. The gauge must match the compressor's normal pressure, possible surge, measured medium, connection, environment, and power supply as one set of requirements.

1. Set the pressure range around the normal working pressure. A practical starting point is to keep normal operation near one-third to two-thirds of full scale, then confirm the final range against the maximum operating and transient pressure.
2. Choose accuracy for the decision the reading supports. The supplied product information lists 0.1%, 0.2%, and 0.5% accuracy options. A smaller displayed increment does not by itself create a more accurate measurement.
3. Match the pressure basis and units. Confirm gauge, absolute, vacuum, or compound pressure, then specify the required unit such as kPa or MPa. A menu cannot change the underlying pressure reference of a sensor.
4. Match the connection and wetted materials. The supplied model lists M20×1.5 as the standard connection and allows the thread to be specified for an order. The measured air, gas, liquid, seals, and stainless-steel wetted parts must be compatible.
5. Address compressor pulsation and vibration. Use an appropriate snubber, siphon, remote connection, or damping configuration when rapid pressure changes could fatigue the sensing system or make the display unstable.

Digital Air Pressure Gauge for Air Compressor

This is the supplied product entry for the page. Confirm the exact pressure range, pressure basis, thread, power option, quantity, and delivery requirement in the quotation.

Digital Air Pressure Gauge for Air Compressor

A four-digit LCD pressure gauge for local pressure indication in air-compressor and other industrial measurement points. The supplied product page lists stainless-steel pressure components, selectable AC, DC, or battery power, and configurable pressure ranges and connections.

• Accuracy options0.1%, 0.2%, or 0.5%
• DisplayFour-digit LCD with kPa or MPa indication
• Standard connectionM20×1.5; custom thread available by order
• Power optionsAC 220 V, DC 24 V, or 3.6 V battery
• Ambient temperature−20 to 60 °C
• Ambient humidity≤85%

Request a QuoteProduct details

Technical Specifications for the Supplied Model

The table below separates information shown on the supplied product page from the confirmation points that affect the final model.

The pressure range statements on the supplied product page are not identical. Treat the range as an open quotation item rather than combining the values into one specification.

Installation and Operating Practices

Install through the connection, not the case

Install the gauge vertically and away from direct heat. Match the instrument thread to the equipment connection before applying force. Tighten with a wrench on the connection hex and do not rotate the case by hand, because twisting the case can disturb the sensing assembly and calibration.

Control pulsation before it reaches the gauge

Compressor discharge lines can create rapid pressure changes. Keep the gauge within its rated pressure and temperature limits, and use a suitable snubber, siphon, or other approved damping arrangement when pulsation is part of the operating condition. The gauge displays pressure; it does not replace a relief valve, interlock, or controlled isolation procedure.

Check the reading and power state

Before operation, confirm the pressure basis, range, unit, connection seal, and power or battery condition. Zero the instrument only under the manufacturer-defined zero-pressure or reference condition. During maintenance, isolate and release pressure before loosening a connection, and keep the sensing port, case, and electrical parts free from contamination or moisture.

Manufacturing and Quality Checks

Hangzhou Dongya Instrument Co., Ltd. is the stated manufacturer for the supplied product. The product page describes a stainless-steel pressure system and case, a sealed cover with safety glass, and silicone or glycerin filling as a damping option for vibration and pressure pulsation.

The company's pressure-instrument process records incoming inspection, component preparation, pressure-sensing assembly, movement or electronics assembly, initial calibration, case sealing, final calibration, and full inspection. For an order, the useful quality document is the one that matches the delivered model, range, accuracy option, and serial or batch identification.

For compressor service, request confirmation of the selected pressure range, accuracy, connection, power option, medium compatibility, and any calibration or inspection record before shipment. If a third-party report is required, define the report type, covered range, laboratory, sample, cost, and timing before production.

Questions to Confirm Before Ordering

Can this gauge measure air-compressor pressure?

It can be considered when the compressor pressure, pressure basis, range, connection, medium, temperature, and pulsation are compatible with the selected configuration. The final model should be confirmed from those conditions rather than from the words “air compressor” alone.

Does a digital display guarantee high accuracy?

No. The display improves numeric readability, while accuracy depends on the selected accuracy option, range, temperature, calibration, and installation. Specify the accuracy definition and the calibration document required for the purchase.

Which pressure range should be ordered?

Provide normal working pressure, maximum operating pressure, possible surge, pressure basis, and unit. The supplied product page contains both a detailed range of −0.1–0–100 MPa and a 0–250 MPa header statement, so the quotation must identify the exact model and range.

Can the connection be customized?

M20×1.5 is listed as the standard connection. Other thread models may be available by order, but the equipment-side thread, size, sealing method, and orientation must be stated before quotation.

Which power option is suitable?

Choose AC 220 V, DC 24 V, or 3.6 V battery according to the installation point. Battery duration depends on operating conditions, so confirm the expected service pattern and replacement access for field installations.

What should be included in a request for quotation?

Send the pressure basis, normal and maximum pressure, unit, medium, temperature, pulsation or vibration condition, connection, power, accuracy, quantity, destination, and required inspection or calibration documents.