Draper Expert Digital Air Line Gauge

For professional tyre pressure measurement where precision is everything, the Draper Expert DAC403 Digital Air Line Gauge raises the bar on workshop accuracy. Combining industrial-grade build quality with advanced digital readout technology, it is designed specifically for the demands of garage forecourts, tyre fitting bays, and commercial vehicle workshops where accurate pressure data is critical to safety and efficiency.

At the heart of the DAC403 is a large backlit LCD screen that delivers clear, instant pressure readings in multiple units — eliminating any ambiguity associated with analogue needle gauges, especially in dimly lit workshop environments. With a reading accuracy of 0.01 bar and 0.1 psi, this is one of the most precise air line gauges available in its class, giving technicians and fleet operators complete confidence in every measurement.

The DAC403 covers an impressive pressure range of 0.3–17.2 bar (4–250 psi) with a maximum air supply rating of 18 bar (260 psi), and delivers a high inflation flow rate of 500 litres per minute (18 CFM) at 13 bar — making light work of even larger commercial tyres. Twin open-ended push-on connectors provide quick, reliable attachment to tyre valves, while the 0.53m hose and standard 1/4" BSP taper female inlet ensure compatibility with the vast majority of workshop compressor setups.

Rated for operation between -15°C and 55°C, the DAC403 performs reliably across a wide range of working environments. Two AAA batteries are included in the box, and every unit is supplied with a calibration certificate — providing the documentation required for professional compliance and workshop quality assurance records.

Key Features:

• Digital pressure readout with 0.01 bar / 0.1 psi reading accuracy
• Large backlit LCD screen for clear readings in all lighting conditions
• Multi-pressure unit display
• Twin open-ended push-on connectors for fast valve attachment
• High inflation flow rate: 500 l/min (18 CFM) at 13 bar
• Pressure range: 0.3–17.2 bar / 4–250 psi
• Maximum air supply: 18 bar / 260 psi
• Standard 1/4" BSP taper female inlet
• Operating temperature range: -15°C to 55°C
• Supplied with calibration certificate and two AAA batteries
• Product Code: DAC403

Specifications:

Ideal For: Garage forecourts, tyre fitting bays, commercial vehicle workshops, and fleet maintenance operations requiring the highest level of digital pressure accuracy, calibration compliance, and fast inflation performance.

Q: How accurate is the Draper Expert DAC403 digital air line gauge? A: The DAC403 offers a reading accuracy of 0.01 bar and 0.1 psi — significantly more precise than analogue alternatives — making it ideal for professional environments where exact tyre pressure measurement is critical.

Q: Does the Draper DAC403 digital gauge come with a calibration certificate? A: Yes. Every DAC403 is supplied with a calibration certificate along with two AAA batteries, making it ready to use straight from the box and fully documented for professional compliance records.

Q: What pressure range does the Draper Expert DAC403 cover? A: The DAC403 covers a pressure range of 0.3–17.2 bar (4–250 psi) with a maximum air supply rating of 18 bar (260 psi), suitable for a wide variety of car, van, and commercial vehicle tyres.

Q: What is the inflation flow rate of the Draper DAC403? A: At 13 bar, the DAC403 delivers an inflation flow rate of 500 litres per minute (18 CFM), ensuring fast and efficient tyre inflation even on larger commercial vehicles.

Q: What is the difference between the Draper DAC403 and the analogue ALG43 or ALG44 inflators? A: The DAC403 uses a digital LCD display with 0.01 bar accuracy and multi-unit readout, offering greater precision than the analogue gauges on the ALG43 and ALG44. It also features a backlit screen for use in low-light conditions and is better suited to applications where documented measurement precision is a priority.