Dewell digital differential pressure gauge pressure gauge

477A series digital differential pressure gauge from Dewell, USA

New adjustable damping function for smooth reading
Monitor positive pressure, negative pressure, or differential pressure
You can choose from 9 different metric or imperial engineering units at any time.
• Can store 40 sets of data
Overvoltage sound and light alarm
One 9V battery can work for 100 hours

Dewell digital differential pressure gauge pressure gauge

The 477A series handheld digital differential pressure gauge has an accuracy of 0.1% and is widely used. It is equipped with high-precision differential pressure sensors, with a measurement range from 20 inches of water column to 100 psid, fast response speed, and can choose 9 pressure engineering units on site, avoiding tedious unit conversion. The 477A series can store 40 sets of measurement data, making it very suitable for HVAC technicians to cooperate with pitot tubes for multi-point wind speed measurement of duct sections. 477A is also a high-precision tool for maintenance and calibration personnel to check and calibrate other instruments and equipment.
When working in low light conditions, there is a backlight display function. The digital differential pressure gauge will automatically shut down after 20 minutes to reduce battery consumption. Equipped with button zero calibration, simple and convenient. Press and hold the "Hold" button to maintain the current temperature and humidity measurement values. Equipped with overvoltage alarm function, it can also emit a confirmation sound when storing data to ensure normal and reliable data operation during multi-point wind speed measurement, without having to stare at the display screen all the time.
Clear and concise operating instructions and functions are printed on the back of the differential pressure gauge's cast aluminum casing, which can be easily accessed at any time. The buttons on the front panel are covered with protective film, making them easy to clean. Comes with detailed instructions, wristband, and 9V alkaline battery.

Technical indicatorsDewell digital differential pressure gauge pressure gauge

Medium air and non combustible mixed gas
The material can be negotiated with the manufacturer
Accuracy from 15.6 to 25.6 ° C (60 to 78 ° F), ± 0.10% of full scale

0-15.6 and 25.6-40 ° C (32-60 and 78-104 ° F), ± 1% of full scale

Pressure lag of ± 0.1% of full range
Pressure Range View Table
Temperature range 32 to 104 ° F (0 to 40 ° C)
Storage temperature range -4 to 176 ° F (-20 to 80 ° C)
Display 0.42 '' (10.6mm) 4-1/2? LCD (Liquid Crystal Display)
Resolution View PDF Table
Power configuration: 9V alkaline battery. Equipped with battery but not installed
Weight 289 g (10.2 oz.)
Connect two quick couplings for 1/8 '' (3.18 mm) or 3/16 '' (4.76mm) inner diameter tubes only for 477A-1477A-2477A-477A-4
And 477A-5. Two compression joints are used for 1/8 '' (3.18 mm) inner diameter x 1/4 '' (6.35 mm) outer diameter pipes only for 477A-6 and 477A-7.

On site verification of instruments, meters, and devices

on-site calibration