$226.00
SE
BOSEAN BH-90-O3 Portable Gas Alarm 0~20ppm
Electrochemistry0~20ppmDiffusionDiffusion

$239.00
SE
BOSEAN BH-90M-O3 Ozone Gas Detector
0-10ppm
Range 0-10ppm, resolution 0.1ppm, unit ppm, suitable for gas ozone, very convenient to use and maintain, which greatly meets the needs of high reliability of equipment for industrial site safety monitoring.

$338.00
SE
BOSEAN K-G60 (O3) Industrial Ozone Gas Alarm Detector
Ozone O30~10ppm
Fixed, measure combustible gas (O3), range 0-10PPM, multi-parameter LCD digital display, full software calibrate, semiconductor nano-process, infrared remote control remote operation, up to 8 meters.

$257.00
SE
BOSEAN BH-60-O3 Fixed Ozone Detector with Display + Alarm 0~20ppm
electrochemistryozone

If you don't know how to choose "Gas detector", please consult customer service.