OpCheck is a software application developed specifically to create a high level of safety and reliability in Safeguard Analytics gas detection sensors. That is accomplished by combining continuous supervision of the gas sensor element and associated circuits then adding analysis of performance data during routine calibration. OpCheck is a standard feature in every Safeguard Analytics gas detection sensor and transmitter. Using a Bluetooth® connection between the sensor and a phone or tablet, critical data is downloaded and stored in the handheld. Service and calibration reports in single device or multi-device formats can be uploaded or emailed to a cloud or to a central database. The application can be installed in and used with Android devices.