Based on 95 reviews
Joseph Corsentino
Such an Easy Purchase

Hi I am a volunteer firefighter in Hazlet, NJ and I fix all of our Sensit and Gmax meters. This was such an easy purchase. Great website. I will definitely be purchasing from you again. Thank you

Carl S
Nice product!

Purchased (3) O2 depletion sensors and found them to be very nice units, easy to install, and very affordable. has great communication with their customers, letting them know the order was received, payment processed, and let you know when the item has shipped! I highly recommend them ! I will purchase again from them in the future!! Carl S


You actually talk to a person. Mark listens to your requirements and if he is unable to help will direct you to another firm that may be able to help.

George Geer Benchmark Test Engineer ESD / Calibration Coordinator
Awesome Response / Service / Product

I purchased 6 of the O2 Enrichment Monitors, All worked perfectly. I had questions that were answered within minutes. Certs wee sent which saved tons of paperwork and time. I will come back for all my Monitor needs.

Ryan Chambers (UCSB R+D Engineer)
Knowledgeable and Honest Tech Support

I was trying to monitor Temp and CO2 percentage of an incubator. I talked with Mark one of the techs at Gaslab and he actually found a way for me to use my incubator's 4-20 mamp output rather than buy an external sensor from him over the phone. He offered the best solution. A solution that didn't involve selling me a sensor i didn't need.
Respect was earned and I will go back for my sensor needs.

Excellent service

There were some issues with the battery of the equipment, as can happen.
The refund was prompt, even our shipping charges got reimbursed!
Couldn't be any better

Jennifer Tremaine
Answered all my questions

Knowledgeable about their products. Article about MAP for meat was very interesting.