Dwyer 475 series mark III Handheld digital differential gauge

Xi'an Ao Xin Automation Instrument Co., Ltd.  

(formerly named   Xi'an Ao Xin Automation Instrument Pneumatic Co.,ltd.) is a leading Chinese company specializing in the AO XIN Radar level meter   Pressure Measurement  Temperature   Measurement and some other kinds of products . We are a key member China of Pneumatic Association, and is awarded AAA Credit Grade by Bank of China.
High quality of the raw materials, the precision of the parts, the hard tests during and at the end of production are a warranty of reliability and features. Our real strength is to develop customised products to solve any requirement of utilisation. The production runs conforming to the rigorous ISO 9001/2000 requirements .  The product range consists of  sensor transmitter  pressure switch .differential pressureswitch   etc ,which are found in a variety of industrial applications such as machinery, metallurgy, food, textile and waste treatment.

Dwyer 475 series  mark III Handheld digital differential gauge 

Dwyer 475 Series handheld digital differential pressure gauge accuracy is 0.1%, can accurately measure air pressure slightly

477A Series handheld digital differential pressure gauge accuracy of 0.1% , and versatile. It is equipped with a high-precision pressure sensor , measuring range from 20 inches of water to 100psid, reaction speed, field selectable engineering units nine kinds of pressure , avoiding the cumbersome unit conversion . 477A Series can store 40 sets of measurement data , ideal for HVAC technicians to do with the Pitot tube duct cross-sectional multi-point velocity measurements. 477A also the maintenance personnel precision calibration tool to check the calibration of other instruments and equipment .
When working in low light conditions , backlit display. Digital differential pressure gauge after 20 minutes will automatically shut down to reduce battery power consumption. Zero calibration with keys , easy and convenient. Press and hold the "Hold" button to hold the current temperature and humidity measurements . With over-voltage alarm function , but also a confirmation sound when storing data , to ensure multi-point velocity measurements in the normal operation of reliable data , without having been glued to live display.

Clear and concise instructions and functions are printed on the back of the differential pressure gauge cast aluminum housing , you can easily access at any time . The front panel buttons have protective coating , easy to clean. With detailed instructions , wrist strap and 9V alkaline batteries.
Service: Air and non-combustible compatible gases.
Wetted Materials: Consult factory.
Accuracy: 0.10% of full scale from 60 to 78 F (15.6 to 25.6 C); 1% of full scale from 32 to 60 and 78 to 104 F (0 to 15.6 and 25.6 to 40 C).
Pressure Hysteresis: 0.1% of full scale.
Pressure Limits: See Ordering page.
Temperature Limits: 32 to 104 F (0 to 40 C).
Storage Temperature Limits: -4 to 176 F (-20 to 80 C).
Display: 0.42 "(10.6 mm) 4 digit LCD.
Resolution: See Ordering page.
Power Requirements: 9 V alkaline battery, installed non-functional, user replaceable.
Weight: 10.2 oz (289 g).
Connections: Two barbed connections for use with 1/8 "(3.18 mm) or 3/16" (4.76 mm) ID tubing for 477A-1, 477A-2, 477A-3, 477A-4 and 477A-5 only Two. compression fittings for use with 1/8 "(3.18 mm) ID x 1/4" (6.35 mm) OD tubing for 477A-6 and 477A-7 only.
On-site calibration instruments and devices
On-site calibration