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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🔍 Catch leaks before they catch you!

RUGGED READY - Comes with a durable carry case for on-the-go professionals who demand reliability.
TRUSTED SUPPORT - Made in the USA with expert technical support via email and phone—because downtime isn’t an option.
HEAR THE INVISIBLE - Integrated headphones let you listen to ultrasonic leaks even in noisy environments.
PINPOINT PRECISION - Laser pointer guides you directly to the leak source—no more guesswork.
VERSATILE DETECTION - Detects all gas pressure and vacuum leaks, plus electrical arcs and steam trap malfunctions.

The Inficon 711-202-G1 Whisper Ultrasonic Leak Detector is a professional-grade tool designed to detect all gas pressure and vacuum leaks with ultrasonic technology. Featuring headphone audio monitoring, a laser pointer for precise leak identification, and robust construction with a carry case, it operates on 2 D-cell alkaline batteries. Made in the USA, it offers reliable technical support, making it an essential device for maintenance and safety professionals.

Brand	Inficon
Model Number	711-202-G1
Product Dimensions	38.1 x 9.53 x 21.59 cm; 1.36 kg
Color	ホワイト
Name List for Name Plates	レーザー。
Are Batteries Included	Yes
Item Weight	1.36 Kilograms

Inficon 711-202-G1 Whisper Ultrasonic Leak Detector by Inficon

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