The RLD15B refrigerant detector is designed and certified to meet the new tougher standards and detect the latest refrigerants. Equipped with a heated sensor to increase accuracy and reduce false alarms, the RLD15B displays Approximate leak sizes with the digital leak size indicator to help pinpoint leak sources. Finally, the mechanical pump draws Gas over the sensor faster providing a quick response in a variety of contaminated or windy environments.from the manufacturer: uei test Instruments has over 50 years’ experience designing and manufacturing A broad range of award-winning, industry-leading test and measurement tools. Professionals recognize the UEi brand for quality and innovative features designed to solve real-world problems. Uei backs its products with dedicated TECHNICAL support, service and repair teams.