• Senses all CFC, HCFC and HFC refrigerants and blends, such as R12, R22, R134a, R404a, R410a, R502 and R507 among others
• Selectable sensitivity to pinpoint small, medium or large leaks
• Headphone port allows for headset use in noisy environments
• Unique visual sensor calibration system
• Manual or automatic zero modes
• Positive ion emission heated diode type sensor
• Visible LED at probe tip and audible buzzer alarm
• 1 sec response time
• Improved sensor responsiveness with ultra-sensitive detection
• 3 hr battery life
• Approximate 2 min warm-up time
• Includes both wall adapter and battery power options for greater convenience and portability

The Mars® H-10 Pro combines and enhances all the features of the previous H-10 series models into one full featured unit. The H10 Pro refrigerant leak detector continues to be the universal standard for checking halogen based refrigerant leaks in residential and commercial applications. With automatic auto zero balance control it's unique sensor calibration system will pinpoint small, medium and large leaks. The instrument uses a tried-and-true positive ion emission heated diode with audible and visual leak rate indicators. It is the most sensitive and accurate leak detector to detect all CFC, HFC, and HCFC non-flammable refrigerants. The unit is mounted in a durable carry case which houses the 4.5 foot probe with built in filter, carrying strap, wall adapter and operating instructions.