Slideshow Items

  • acniti dissolved ozone sensor for wastewater applications
  • acniti EL-550 dissolved ozone sensor for industrial and research applications
  • acniti mobile dissolved ozone sensor for calibration

Measure ozone in water

Measure ozone concentrations levels from 0-50 mg/L precisely in water. The unit measures ozone concentration with UV light, the sensor has a built-in self-priming suction pump to take in sample water and reference water. This unit is excellent for universities and research departments of companies. The sensor has a possibility to connect a recorder to collect data overtime. Furthermore, it has an ERR output and a "Hi Lo" output.

UV Technology

Ozone has a maximum absorption band near the wavelength of ultraviolet at 253.7 nanometers. A low-pressure mercury lamp light source has an emission line spectrum at 254 nm. By irradiating ozone with this wavelength, the amount of light without ozone gas (I0) and the amount of light with ozone gas (IX) are Lambertian. Lambert law : when an area element is radiating as a result of being illuminated by an external source, the irradiance (energy or photons/time/area) landing on that area element will be proportional to the cosine of the angle between the illuminating source and the normal.

The ozone concentration is obtained from Beer-Lambert law, and compared with a standard device calibrated by the iodine titration method to make a correction and use it as the display value at the end of calibration Beer-Lambert law relates the attenuation of light to the properties of the material through which the light is travelling.

Since the measured ozone concentration is inversly proporational to the gas or water temperature, most units are equipped with a temperature sensor. The temperature reading is used to autocompensate the ozone concentration output.

Polarograph polymeric membrane technology

The theory of this polarograph with polymeric membrane type dissolved ozone monitoring is generally used in the Electro chemistry analysis and has many use cases. Ozone in water consists of ozone ions, and will enter through the polymeric membrane into the working electrode, reacting the ions on its surface. On the counter electrode happens an equivalent reaction of oxidation on the surface, to which the electric current is proportional to the ozone concentration generated.

EL550 UV technology

The EL-550 is an ozone monitor that is intended to be incorporated into equipment, and has been made compact and reasonably-priced by minimizing functions other than analog output. It can be installed on the wall or on the floor to reduce restrictions on installation location.

EL610 UV technology

The EL-610 is a more advanced model ozone monitor than the EL550. The sensor has more functionality and the sensor and the controller are separated which increases the freedom in installation.

ELP-200 polymeric membrane technology

The ELP-200 is generally used for "dirty" water applications as the sensor technology is not influenced by various metallic ions and their conductivity in sample water. The flow cell and controller are separated from eachother making installation easier.

CX-100 II

The CX-100 II is the most economical solution to measure dissolved ozone and other dissolved components such as trichloroethylene, tetrachloroethylene, 1.1.1 Trichloroethane, Carbon Tetrachloride, Ammonia (Ammonium ions), Hydrogen Sulfide. The sensor is not based on the UV method described above. The unit is easy to carry as it is battery powered. It can measure accurately water temperatures from 5°C to 35°C or 41°F to 91°F. Acniti recommends the CX-100 II for calibrating the ELP-200.

If you would like to read more about the CX-100 II read the blog post.

Measure accurately ozone levels in water

  • Ozone water concentration sensor 0-50 mg/L
  • For high precision measurement of ozone concentrations
  • Calibration performed automatically and can be set to frequent or infrequent calibrations
  • Excellent ozone sensor for universities and research and development departments


  • Model nameEL-550 Series
    Model numberEL-550
    Spec sheetEL-550 Series
    Minimum flow / minute 0.1 Liter0.0 Gallon
    Maximum flow / minute 3.0 Liter0.8 Gallon
    Minimum flow / hour 3.0 Liter0.8 Gallon
    Maximum flow / hour 180 Liter48 Gallon
    water temperature minimum5 ℃41 ℉
    water temperature maximum40 ℃104 ℉
    Ambient temperature minimum5 ℃41 ℉
    Ambient temperature maximum40 ℃104 ℉
    Relative humidity minimum0 %0 %
    Relative humidity maximum90 %90 %
    Unit phase Ø voltage100-220V ±10% AC50/60Hz
    Unit power consumption50VA
    Wetted partsSynthetic quartz, PTFE, PFA
    Pump pressure setting0.3 MPa (G) or less
    Dimensions & weightMetricImperial
    Dim. (w) x (d) x (h)220 x 105 x 150 mm8.7 x 4.1 x 5.9 inch
    weight2.2 Kg4.9 lbs.
  • Model nameEL-610 Series
    Model numberEL-610
    Spec sheetEL-610 Series
  • Model nameELP-200
    Model numberELP-200
    Spec sheetELP-200
    Minimum flow / minute 0.5 Liter0.1 Gallon
    Maximum flow / minute 1.0 Liter0.3 Gallon
    Minimum flow / hour 30 Liter7.9 Gallon
    Maximum flow / hour 60 Liter16 Gallon
    water temperature minimum5 ℃41 ℉
    water temperature maximum30 ℃86 ℉
    Ambient temperature minimum5 ℃41 ℉
    Ambient temperature maximum40 ℃104 ℉
    Relative humidity minimum0 %0 %
    Relative humidity maximum90 %90 %
    Unit phase Ø voltageAC 100~240V 50/60Hz
    Unit power consumption5 VA
    Water inletFitting straight tightening joint stainless steel
    Dimensions & weightMetricImperial
    Dim. (w) x (d) x (h)125 x 81 x 560 mm4.9 x 3.2 x 22.0 inch
    • Dissolved ozone analyzer for sewage.
    • Measures dissolved ozone through a gas-permeable membrane, not easily affected to residual chlorine and dissolved organic substance.
  • Model nameCX-100II Dissolved Matter Detector
    Model numberCX-100II
    Spec sheetCX-100II Dissolved Matter Detector
    water temperature minimum4 ℃39 ℉
    water temperature maximum30 ℃86 ℉
    Dimensions & weightMetricImperial
    Dim. (w) x (d) x (h)225 x 105 x 240 mm8.9 x 4.1 x 9.4 inch
    weight2 Kg4.4 lbs.
    • It is very small and lightweight and suitable for on-site measurement.
    • Since it is aerated in a closed container, it can measure even low concentrations with high sensitivity.
    • Calibration (standard solution) is not required during measurement
    • The sample collection volume is as small as 10 or 50 mL.
    • There is no need for temperature compensation, and measurement variations among operators have been reduced.
    • Almost unaffected by coexisting substances in the sample.
    • The cleaning filter is not affected by ambient gas.
    • Dissolved ozone, trichlorethylene, tetrachlorethylene, dissolved sulfide, and ammonia can be measured simply by changing the detector tube.

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