KROHNE’s OPTICHECK flowmeter verification tool provides in-situ verification for mass and other flowmeters. It enables operators to perform preventive maintenance and responsive service to ensure that installed flowmeters are performing to specification. When the tool is connected in-line on site, it gathers measuring data to ensure that the flowmeter is performing within 1% of the factory calibration with a confidence level of 95%. The baseline for comparison can be historic repair data from the factory or on-site test results after performing a full verification. The device comes with all cables and accessories for easy connection and handling.