Digital Manometer Differential Pressure Gauge +/- 0 to 2 PSI

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Product Overview

This Digital manometer has been designed to meet the measurement requirements of industry standards with CE approval. It has 11 selectable units of measure, easy to use with one handed operation it can measure both gauge and differential pressure can record Minimum, Maximum, and Average readings along with time stamp. To zero the unit before operation simply press the hold button for 2 seconds and it will automatically calibrate the zero point and you are ready to go. It also has a nice bright backlight that will help you see the screen in the dark environments. It comes ready to go with tube, battery, carry holster and operation manual. In some industries reducer or straight connector maybe required to step up or down test points, the advantage of using various straight connectors gives the user multiple sizes to choose from. 

  • 11 Selectable Units
  • 3mm to 4mm Test point
  • Carry Holster
  • Gauge & Differential
  • Auto Power Off
  • Max/Min/Avg Data Hold
  • Built in backlight for working in the dark areas
  • Standards CE Approval


AHJ501 Layout 1. Backlight 
2. Record
3. Units
4. Data Hold
5. Differential
6. On/Off
7. LCD
8. Positive Port
9. Negative Port


AHJ501 Layout Display

1. Hold Function
2. Differential Mode
3. Primary Data Screen
4. Record Mode
6. Low Battery Indicator
7. Pressure Unit Indicator
8. Relative Time Clock


Display Standard Dual LCD
Accuracy +/-0.3%FSO(25 degree)
Repeatability +/-0.2%(Max+/-0.5%FSO)
Linearity/Hysteresis +/-0.29%FSO
Operating Pressure +/-2psi
Maximum Burst Pressure 10psi
Response Time 0.5seconds typical
Low Battery Indicator Yes
Over Range Indicator Err.1 (Over 2psi)
Under Range Indicator Err.2 (Over-2psi)
Operating conditions 30 ~ 122F degree(0 ~ 50C degree)
Storage Condition 14 ~ 140F degree (-1~60C degree)
Power Supply 1 x 9V Battery
Standard Accessories 3 x Tubing, Battery, Manual, Carry Holter


Units  Range  Resolution
inH₂O  +/-55.40     0.01
psi  +/-2.000     0.001
Mbar  +/-137.8     0.1
kPa  +/-13.79     0.01
inHg  +/-0.407     0.001
mmHg  +/-103.4     0.1
ozin2  +/-32.00     0.01
FtH₂O  +/-4.612     0.001
cmH₂O  +/-140.6     0.001
Kgcm2  +/-0.137     0.001


What's In The Box

Delivery Box
  • AHJ501 Digital Manometer
  • Instruction Manual
  • Battery 9 Volt
  • 1 Year warranty
  • 2 x Rubber Tube
  • 1 x Silicon Tube
  • Straight Connector 3.9mm to 6.4mm
  • CE Approval
CE   1 Year Warranty        


Warranty Information


12 Months Warranty


(3 reviews) Write a Review

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  • 1
    Poor man pays twice

    Posted by Kody on 22nd Mar 2024

    Just another cheap Chinese knock off. The silicon hoses are to small to be of use in Australia the battery came flat and doesn't fit it the cover properly. Customer service shocking advised me to buy adaptors plus bigger hose so I can use it by the time I've done that I could have just brought the actaul bromic unit . Waste of time go elsewhere

  • 4
    Great product

    Posted by Unknown on 3rd Jul 2018

    Arrived extremely quick Used today. Works perfectly Great for checking gas valve pressure. Only downside is the supplied hoses are to small to fit on gas valve test ports. 1 quick modification of supplied silicone hose and job done

  • 5
    Simple and Easy to Use

    Posted by Unknown on 6th Jun 2017

    Arrived exactly as promised and on first use it became obvious just how easy this meter is to use. Found the issue I was looking for in a couple of minutes, this alone saved hours of parts substitution and made the task so easy.