The Model C is a non-calibrated detector used primarily for arson investigation and where it is desirable to detect trace amounts of hydrocarbons.
The Model C+ features both a High Sensitivity and Calibrated mode of operation. Model C+ is used when it is desirable to know if a gas is explosive. In the “Calibrated Mode”, the detector will only annunciate if a gas has exceeded a preset level, 20% of the lower explosive limit (methane used as test gas).
The Model 850 Investigator’s Aid is a ruggedly constructed gas detection and field survey tool. This unit will detect the presence of hydrocarbons that may be present at the fire scene and is equally effective as a general purpose gas detector
The Model 851 Investigator’s Aid is a Calibrated, precision instrument designed specifically for detecting petroleum volatiles, hydrocarbons and natural gas. The detector features two modes of operation: a High Sensitivity search mode for locating very small gas leaks and a Calibrated mode of operation that indicates 0% to 100% of the lower explosive limit (LEL), with methane used as the test gas.