Qty:1

Other Sellers on Amazon
Add to Cart
$74.99
+ Free Shipping
Sold by: Fixitshop
Add to Cart
$77.76
& FREE Shipping on eligible orders. Details
Sold by: Treasure_Trove863
Add to Cart
$82.34
+ $4.99 shipping
Sold by: Patriot Supply
Have one to sell? Sell on Amazon

Supco DDM55 Dual Input Digital Differential Manometer with LCD Display, -55 to 55" H20 Measuring Range, 0.01" Resolution, Battery Operated

4.3 out of 5 stars 23 customer reviews
| 4 answered questions

Price: $77.79 & FREE Shipping. Details
Only 4 left in stock (more on the way).
Ships from and sold by Amazon.com.
14 new from $74.99

Specifications for this item
Brand Name Supco
Part Number DDM55
UPC 687152201433 , 787461660706
Color Multicolored
EAN 0787461660706 , 0687152201433
Item Weight 8 ounces
Number of Items 1
UNSPSC Code 41103311


Frequently Bought Together

  • Supco DDM55 Dual Input Digital Differential Manometer with LCD Display, -55 to 55" H20 Measuring Range, 0.01" Resolution, Battery Operated
  • +
  • Fieldpiece ASP2 Static Pressure Probes
  • +
  • Pyle  PMA90 Digital Anemometer / Thermometer for Air Velocity, Air Flow, Temperature
Total price: $158.74
Buy the selected items together

Product Features

  • Portable differential manometer provides differential pressure measurements in low-pressure gas systems
  • For use performing leak tests, setting delivery pressures, making regulator adjustments, and confirming pressure switch operation
  • -55 to +55 inches H20 measuring range and + or - 0.3% full scale accuracy
  • Units of measure include performing leak tests, setting delivery pressures, making regulator adjustments, and confirming pressure switch operation
  • LCD with backlight and data hold provides access to measurements

Product Description

The Supco DDM55 digital manometer performs differential pressure measurements in low-pressure gas systems, including performing leak tests, setting delivery pressures, making regulator adjustments, and confirming pressure switch operation. The instrument has a -55 to +55 inH20 measuring range, + or - 0.3% full scale accuracy, and includes eleven units of measure including performing leak tests, setting delivery pressures, making regulator adjustments, and confirming pressure switch operation. The LCD has a backlight for viewing in a variety of lighting, and a data hold function to retain the last reading for recording. The manometer is powered by one 9V battery (included) or external 9V DC power, and includes flexible tubing, 1/8" MPT x 1/8" barb access fitting, and a soft carrying case.

Specifications
Pressure typesDifferential
Media compatibilityGas
Pressure range-55.0 to +55.0 inH20
Accuracy+ or - 0.3% full scale accuracy
Response time0.5 seconds, typical
Engineering unitsInH20, ftH20, cmH20, psi, bar, mbar, kPa, inHg, mmHg, ozin2, Kgcm2
Pressure limits10 psi
DisplayDual LCD
Connection1/8" MPT x 1/8" barb
Operating temperature32 to 122 degrees F/0 to 50 degrees C
Power requirements9V battery or external 9V DC

Manometers measure the pressure of a liquid or gas. They are used in laboratory, medical equipment, engineering, automotive, and heating, ventilation, and air-conditioning applications. Manometers measure any combination of gauge, absolute, or differential pressures. Gauge pressure is the amount of pressure in a system relative to the ambient pressure, absolute pressure is the amount of pressure in a system relative to an absolute vacuum, and differential pressure is the difference between two pressures. Analog manometers are composed of columns of liquid, and they use gravity and the liquid's density to calculate pressure. Because they have no moving parts, analog manometers do not require re-calibration. Digital manometers have pressure sensors that are connected to a system with a hose to provide a digital readout of the amount of pressure present in a system. They use microprocessors to calculate pressure, and they require periodic calibration to help ensure accuracy.

Supco manufactures test instruments and replacement parts for heating, ventilation, air conditioning, and refrigeration systems. The company, founded in 1945, is headquartered in Allenwood, NJ.

What's in the Box?

  • Supco DDM55 differential manometer
  • Flexible tubing
  • 1/8" MPT x 1/8" barb access fitting
  • 9V battery
  • Soft carrying case
  • Instructions

Product Details

  • Item Weight: 8 ounces
  • Shipping Weight: 11.2 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B004OM8UCU
  • Item model number: DDM55
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (23 customer reviews)
  • Amazon Best Sellers Rank: #37,473 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
I am a digital age person and this fits what I wanted to use. We had numerous questions about our gas pressure and problems with a poorly engineered piece of equipment. Within minutes I had my numbers and while cross referencing the manual, it all fell into place--- without this manometer it was all a shot in the dark and getting nowhere. Now with new equipment going in place, it will make sure everything is correct and set properly. We even had a specialist come prior to this and he was a complete waste of time as this item saved us from wasteful spending.
Comment 7 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
This is a very nice digital manometer. I mostly just use it for inches of water column but it has many other units of measurment. I am in the field with this everyday and it holds up great .
Comment 11 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
Use it for quick minimalistic automotive EVAP testing and things like small equipment fuel tank testing.

Accurate and easy to read.

Serves the limited applications well but wish range was greater.
Comment 5 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
Looking for something cost effective, but reliable. Supco has a great name in HVACR products. Would highly recommend.Light weight compact does the job.
Comment 8 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
I needed a manometer for checking natural gas and propane gas pressures in troubleshooting minor to complex engine related issues. This manamter is the first one I've owned and gives me the range I was looking for including negative (vacum) pressure. Alongside my very expensive emissions tester this tool has quickly become indispensable in being able to troubleshoot both raw and refined gas related issues and enabled me to set both high and low frequency regulators in setting up the most efficient engine parameters in a fraction of the time I spent when guessing as I previously was doing.
Comment 5 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
I'm sure it was accurate, but the quality didn't seem much better than the ones on ebay for $40. In fact it looked identical to those except for the brand label. While those aren't reasons to ding it, mine came through with the power button not seated properly, so it kept turning off and on. It had to go back.
Comment 2 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
Great manometer. Very easy to use. Included hoses and two threaded hose barbs. Worked great. Highly recommended.

Update:
Last week I turned this on and it appeared the battery was low. Screen flashed on like normal but faded off instantly. I installed a brand new battery: same result. Frustrated, I set it down rather firmly on granite counter and suddenly it worked like normal. Haven't had a problem before or since.

So while I have a backup, I was surprised (as well as I treat this device) it sort of had a malfunction here. It tests the same as my backup, so maybe some kind of a connection/humidity thing? Specific to my device only? Anyway, if someone else experiences this, just give it a gentle tap. I downgraded my rating a star because of this.
Comment One person found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse
Verified Purchase
The meter has been tested against higher priced meters and was spot on with the readings. Very good meter for a very good price. I am happy that I bought it.
Comment 5 people found this helpful. Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback.
Sorry, we failed to record your vote. Please try again
Report abuse

Most Recent Customer Reviews


Pages with Related Products. See and discover other items: manometer