| Division of KWJ ENGINEERING INC. |
| Function | Range ppm |
Outputs | Accuracy | |
| A-21ZX | Hand-held portable | 0-10 | LCD digital | 20% |
| A-22 | Portable or Fixed | 0 - 20 | LCD digital 0-2 V 4-20 mA USB |
10% |
| C-21 | Portable or Fixed for VOCs | 0-150 VOCs | LED bargraph Audio alarm 0-2 V and relay |
20% |
| C-30ZX | Fixed monitor with relay and alarm | 0-.14 | LED bargraph Audio alarm 0-2 V and relay |
20% |
| DOM-1 | On-line for dissolved ozone | 0-2 dissolved | LCD digital 4-20 mA | 20% |
| EZ-1X | Hand-held portable | 0-.14 | LED bargraph | 20% |
| EZ-10W | Hand-held for dissolved ozone | 0-.7 disolved | LED bargraph | 20% |
| OG-3 | Calibration checker | .1 | Ozone outflow port | 5% |
| OS-1X | Control generators by set-point | .03-.1 | Relay contacts | 20% |
| OS-3 | This model will be discontinued and is replaced by the OS-4 Ozone Switch™ which has many additional features | 0-10 | LCD digital 0-2 V | 20% |
| OS-4 | Fixed monitor and controller. Digital. | 0-10 | LCD digital 0-2 V and relay 4-20 mA and RS-232 | 10% |
| UV-100 | UV absorption analyzer and controller | 0-900+ | LCD digital RS-232 and USB 0-2 V and 4-20 mA Digital data logger | 2% |