would I need the transmitter device to leak check air conditioning coils etc?

This is a simple tool to hear the whistling of high pressure air going through a small opening. The high frequency pitch is picked up by the microphone. You won't need anything else to operate this. I prefer to use my own headphones instead of the ones in the kit, but that is a personal preference. It also has a sound bar so you can see it, too. You don't need to listen, although I find it helpful.

if I pressurize my underground pool skimmer line with air, would this be practical for locating a leak?

I don't believe it will help in this application. To detect the leak, you must be able to see the line and place the unit relatively close to the hose. So for your application, you would need to expose your lines. If your pool skimmer lines are visible, it is easier to inject a dye, such as a UV dye, and shine a UV lamp to find it. If your lines are not visible then you would need to dig up the line to look for the leak. When I had an underground leak, I hired a person to find it for me. It was worth the money for the one time repair.

Is good for bearing friction detection?

Hello and thank you for your question. Yes, with the optional metal contact probe (711-703-G1) Whisper can detect malfunctions in certain mechanical components, bearings included! The contact probe is included with the version that comes with the accessory kit (711-203-G1). Simply screw the metal contact probe to the tip of Whisper and touch it to the suspected mechanical component. For the best experience, use a pair of headphones to utilize Whisper's heterodyne feature. Properly functioning machinery sounds smooth and clear, whereas malfunctioning machinery may produce grinding, scratching, or other irregular noises.

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🔍 Whisper your way to leak-free perfection!

READY FOR THE FIELD - Comes with rugged carrying case and rubber extension probe for tough jobs
PINPOINT WITH PRECISION - Integrated laser pointer makes locating leaks effortless and exact
VERSATILE LEAK DETECTION - Detects pressure, vacuum leaks, electrical arcing & malfunctioning steam traps
HEAR LEAKS LIKE NEVER BEFORE - Ultrasonic tech detects all gas leaks—even in noisy environments
TRUSTED AMERICAN ENGINEERING - Made in the USA with expert technician support via email and phone

The INFICON Whisper Ultrasonic Leak Detector uses advanced ultrasonic technology to detect leaks of all gases in pressurized or vacuum systems, even in noisy environments. Featuring a laser pointer for precise leak location, included headphones for clear audio detection, and powered by two D-cell alkaline batteries, it’s a rugged, versatile tool designed for professionals. Made in the USA with dedicated technician support, it’s the go-to device for reliable, on-the-spot leak detection.

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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Brand	Inficon
Style	Laser
Color	Grey, White
Item Weight	3 Pounds
Alarm	Audible
Operating Humidity	95 percent
Global Trade Identification Number	00689466037111
Material	HAWA
Number of Items	1
Manufacturer	Inficon
UPC	810044830583 689466037111
Part Number	711-202-G1
Item Weight	3 pounds
Product Dimensions	15 x 3.75 x 8.5 inches
Item model number	711-202-G1
Is Discontinued By Manufacturer	No
Pattern	Whisper
Item Package Quantity	1
Included Components	Whisper, Headphones, Rubber extension probe, 2 D-size alkaline batteries, case
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline

INFICON Whisper, Ultrasonic Leak Detector, 711-202-G1

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