Ehdis Digital Manometer Air Pressure Meter Gas Gauge Reader with 32-bit MCU 24-bit ADC High Accuracy 12 Units Data Save or Hold

Great little tool, some options on pipe connections would be useful

Good service good unit

Good price for the meter. I think it does an ok job but instructions are very poor - next to useless in fact! Left me wondering if I had used it correctly.

I needed a back up and this product is perfect for testing, light and easy to use

Doesn't do the job accurately had to send back

Used this to measure the air intake manifold vacuum on a Porsche Cayman. Manometer worked perfectly, & was fast and stable. The supplied hoses fitted well onto the machine connectors. I like the ability to select different reading scales and also the memory functions. Recommended bit of kit and cheap too!

I’m a gas engineer please don’t even think about buying this product. Pressure doesn’t hold so incorrect readings. I tried it on an air test before using it on gas. Really doesn’t work Tubes are to small to go over a meter test nipple and are even to small for a gas valve outlet

Great product, simple to use and has plenty of different measurements available

Parfait. Fait son travail.

Simpel. Geen moeilijke dingen. Eenvoudig in gebruik. Moet wel op zoek naar wat verloop slangen. Maat aansluitingen dun en slang dus ook.

I bought this because I have a 10+ year old wall-mounted natural gas heater (Empire DV-35 SG) that has very low heat output. On full heat it is supposed to have a flame this is ~ 3” tall, but all I could see was maybe 1/4” tall flame. It would cost well over $1500 to replace this unit, or probably at least $500 to have it fixed. To analyze the problem one needs to measure the natural gas pressure on the supply side of the valve, and on the downstream side (for good vid search “diagnostic testing for gas pressure and gas millivolt valves“) The heater uses a Dexen 6003 millivolt valve; this valve has small pressure taps built in to the body of the unit. The diagnostic process involves turning off the gas supply, opening the supply side pressure tap, hooking up a pressure meter to the tap, then turning the gas back on to measure pressure. Then repeating this exercise on the downstream side of the valve. Published data say the upstream side pressure should be in the range of 5 to 8 inches of water and the downstream side should be ~ 3” of water. I had the option of trying to purchase a “magnahelic” guage (high quality, but expensive), try to set up a classic U-shapped glass tube with water, or purchase an inexpensive digital pressure gage. Despite a couple of mediocre reviews for this digitial manometer I thought the purchase price ($49) was worth the risk. I am not able to calibrate this manometer, so I have to trust the readings out of the box. It gave me 5.77 inches of water on the supply side (OK reading) and 4.2” of water on the downstream side: significantly too high. I interpreted this to mean that the output tube was partially blocked and causing back-pressure, which would be consistent with the very low flame and low heat output that I saw. Upon disassembly of the output tube and orifice I found a spider had built a nest inside and almost (but not quite) totally blocked the flow of gas. I removed the tube/orifice, washed it out, and now my heater is back to working perfectly. In my opinion, spending $49 for this tool, to save a minimum of $500 and possibly more than double that, was exceedingly worthwhile. Perhaps if I were a professional HVAC person who needed a rugged, calibrated, reliable tool, this model would be too simple and maybe not robust enough. But for the homeowner / DIY person this is an excellent solution and a terrific deal. A key point to add: this unit has small diameter tubes, 3/16”, to connect to the device you want to measure. The output taps on the Dexen valve are larger, ~ 1/4” or 5/15”. I needed to separately purchase an adapter that connects the larger diameter tube to the small dia tube that comes with the manometer. Part # RMA316 at Supply House.

Schnelle Lieferung gute Funktion was will man mehr. Die Betriebsanleitung habe ich mir von Google übersetzen lassen mehr braucht dich nicht.

圧力差をちゃんと測れる。