FumiSense Pro-Lo is a handheld Phosphine monitor for monitoring phosphine levels outside the fumigated stack/ silo/ ship to check for leaks and to ensure the level of PH3 is less than the TLV. Equipped with an inbuilt air sampling pump and with the ability to measure PH3 up to 20 ppm, it is the perfect tool for this application. The backlit OLED display enables the user to read the instrument display even in the dark. With user settable datalogging features, the device logs gas concentration values with date, time and location.