EL-550 Ozone Water Sensor: Compact UV Absorption Monitor
The EL-550 is a compact ozone water sensor combining detection and processing in a single all-in-one housing. Using UV absorption technology, it measures dissolved ozone from 0-50 mg/L (default) with ranges up to 150 mg/L available. This cost-effective monitor features analog outputs (0-1V, 0-10V, or 4-20mA), digital display with rotary selection, and operates from 5-40°C water temperature. Ideal for industrial water treatment, research laboratories, and aquaculture applications requiring reliable ozone monitoring.

| Description | Metric | Imperial | |
|---|---|---|---|
| 1 | Model name | EL-550 Ozone Water Sensor: UV Absorption 0-50 mg/L | Acniti | EL-550 Ozone Water Sensor: UV Absorption 0-50 mg/L | Acniti |
| 2 | Model number | EL-550 | EL-550 |
| 3 | Technology | UV Absorption Method | UV Absorption Method |
| Liquid | Metric | Imperial | |
| 4 | Minimum flow / minute | 0.1 Liter | 0.0 Gallon |
| 5 | Maximum flow / minute | 3.0 Liter | 0.8 Gallon |
| 6 | Minimum flow / hour | 3.0 Liter | 0.8 Gallon |
| 7 | Maximum flow / hour | 180 Liter | 48 Gallon |
| 8 | water temperature minimum | 5 ℃ | 41 ℉ |
| 9 | water temperature maximum | 40 ℃ | 104 ℉ |
| Ambient | Metric | Imperial | |
| 10 | Ambient temperature minimum | 5 ℃ | 41 ℉ |
| 11 | Ambient temperature maximum | 40 ℃ | 104 ℉ |
| 12 | Relative humidity minimum | 0 % | 0 % |
| 13 | Relative humidity maximum | 90 % | 90 % |
| Electrical | Metric | Imperial | |
| 14 | Unit phase Ø voltage | 100-220V ±10% AC50/60Hz | 100-220V ±10% AC50/60Hz |
| 15 | Unit power consumption | 50VA | 50VA |
| 16 | Wetted parts | Synthetic quartz, PTFE, PFA | Synthetic quartz, PTFE, PFA |
| 17 | Pump pressure setting | 0.3 MPa (G) or less | 0.3 MPa (G) or less |
| Pump | |||
| Dimensions & weight | Metric | Imperial | |
| 18 | Dim. (w) x (d) x (h) | 220 x 105 x 150 mm | 8.7 x 4.1 x 5.9 inch |
| 19 | weight | 2.2 Kg | 4.9 lbs. |
| 20 | HS code | 9027-9090 | 9027-9090 |
Key features
Measuring ranges
In units mg/L with a continuous measuring ineterval
Sampling method
Water pressure intake or suction by sampling pump is not included in the sensor. Order a sampling pump separetely here
Display function
Available (selection among ozone concentration, light intensity of the sensor or span by a rotary switch) When measuning ozone concentration, minimum figure of the indicator is as follows.






