The ST100 Series Thermal Mass Flowmeter now comes with the VeriCal In-Situ Calibration Verification System. It includes service up to 850 ºF (454 ºC) and is available with both integral and remote electronics versions. It is agency-approved for hazardous environments, including the entire instrument, the transmitter and the enclosure. Approvals include FM and FMc, Class 1, Division 1, hazardous locations, ATEX and IECEx, Zone 1, II 2.