750a Refrigerant Leak Detector, Thumbwheel Operation (0.2 oz/yr) c/w Soft Pouch

Frequently Asked Questions

Will TPI refrigerant leak detectors pick up the new 410A PURON refrigerants?
Yes, all of the 700 series refrigerant leak detectors pick up all current refrigerants and blends, including 404A and 410A (PURON).

What is the advantage of the AIT micro tip used in the 753a?
The Advanced Ionization Technology (AIT) micro tip provides increased stability over a standard corona discharge tip. This enables the use of an internal pump to draw the sample across the sensor, increasing overall sensitivity and response of the 753a detector.

Should I buy a thumb wheel “tic” adjust or push button “tic” adjust?
The thumb wheel gives you a manual adjustment and the push button adjusts top reset levels. Both are easy to use and work equally well. It’s simply a matter of personal preference.

Why would I want a pump on my refrigeration leak detector?
Generally, refrigerant leak detectors with pumps respond and clear faster as you enter or leave the leak area. This is most important when locating small leaks.

I have a hard time finding a leak when on a rooftop in windy conditions. Will I be able to find a leak in the conditions with your refrigerant leak detector?
Always remember that the refrigerant will travel with the wind. Position yourself down wind and work your way “up stream” in order to trace down a leak. The harder the wind is blowing, the more the concentration of refrigerant will be diluted in the air. It is difficult to find these leaks, but it can be done.

Is there a way to determine how many parts per million (ppm) a leak of 0.1 ounce per year(oz/yr) is?
A leak of 134a refrigerant measuring 0.1 oz/yr is equivalent to approximately 380 to 400 ppm. A leak measuring 0.2oz/yr is equivalent to approximately 760 to 800 ppm.

Can any TPI refrigerant leak detectors to beused to test for SF6? Sulfer hexafluoride (SF6) is used in high voltage insulation as found in high voltage lines and circuit breakers. SF6 is toxic and emitted into the air when high voltage insulation begins to degrade. The 753a will detect SF6 at a level of 750 ppm or higher.

Is there anything I can do to extend the life of the sensor?
Even though the sensors are very durable, you can extend the sensor life of your leak detector by press fitting a ½” long piece of vinyl tubing onto the sensor tip. This will help prevent foreign material from getting into the sensor during tests. Clean or replace the tube regularly.