Ntron Oxygen Analyzers include those that can be mounted in a fixed position in hazardous areas for gases with hydrocarbons or no hydrocarbons, such as the MGT4 model, with an electrochemical sensor and operating voltage from 7 to 30 VDC, with four 20 mA scalable outputs (over and under range diagnostic outputs), a four digit LCD display, and operating temperature from -4 to 104F.

Conspec makes oxygen detectors including a gas cylinder, a 2 remote alarm panel, a four, eight, or sixteen channel gas controller for water and wastewater treatment, ozone generators, and confined spaces as well as research. Their remote alarm panel has a 90dB audible alarm, a Nema 4x enclosure, and can be made in custom designs.