VOC gas sensor, full-scale: 50-100ppm for most solvent based VOC, bargraph display, alarm buzzer, output: 0-2VDC, transistor output, battery included

Ozone monitorC-30ZX, measuring range: 0.02 - 0.14ppm, bargraph display, audio alarm, output: 0-3VDC, relay, power supply: 12-24V

Ozone monitor EcoZone EZ-1X, measuring range: 0.02 - 0.14ppm, bargraph display, battery

OS-4 Ozone Switch, range: 0.3 -20ppm, digital display, programmable turn-on and turn-off set-point, relay output, power requirements: 12-24VDC

Industrial grade ozone controller and monitor OS-6, range: 0.1 -50ppm, digital display, programmable turn-on and turn-off set-point, output: relay, RS-232, power requirements: 12-24VDC

Pocket CO monitor, measure CO levels in real-time, small size, CR2450 battery, display, buzzer

Smartphone connected CO monitor, measure CO levels in real-time, small size, rechargeable battery, multi-coloured LED, buzzer

Ozone analyzer UV-100, range: 0 - 999ppm, accuracy: 2%, digital display, output signal: 0-2.5V, 4-20mA, one year warranty, ECO-SENSORS

Ozone analyzer UV-106-L, range: 0 - 100ppm, accuracy:1.5ppb or 2%, digital display, output signal: 0-2.5V, 4-20mA, RS-232, USB, one year warranty, ECO-SENSORS