Digital Differential Pressure Gauge / Handheld Digital Pressure Gauge Model: BL22-477 / Original USA

It has unique features to provide you with faster, easier and more accurate pressure measurement. First, you can choose from up to 9 of the most commonly used imperial / metric pressure units without having to waste time and risk tedious unit conversions. In addition, a stability memory function allows you to store up to 20 readings-especially suitable for HVAC technicians to make pitot tube horizontal measurements of airflow readings in pipes. When working in low-light conditions, simply turn on the convenient backlight function. It will automatically shut down after 2 minutes to save power. The electronic zero-adjustment function means that you can accurately offset any even the smallest pressure difference by simply pressing a key. For common readings swinging up and down, you can use a display stop button to freeze the current pressure. We have also prepared an audible alarm to remind you of an overpressure situation. In addition, there is a visual alarm to alarm in the case of too much noise around. The audible alarm can also be used to determine that a value is stored, eliminating the need to observe the reading during the horizontal measurement of the pipeline.

The concise and clear instructions for all functions are printed on the back of the protruding aluminum shell for easy inspection. All the keys are covered with a film, which completely isolates the keys from dust and moisture, and can be wiped off in just a few seconds. In addition, detailed instructions, a wrist strap and a 9-volt alkaline battery are also attached.

Measuring range

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