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HACH COMPANY was established in 1947, in Ames, Iowa, USA. For more than 60 years, Hach has been the world market leader for Analytical Instrumentation for Complete Water Analysis, providing solutions for lab, process and field.

In 2002, GLI, a leading US manufacturer of process electro-chemistry analytical instruments, became part of the Hach Company family.

Water analysis has to be right. Our customers deserve complete, reliable solutions that they can be fully  confident in. Hach is your answer. We make water analysis simpler

UV Nitrate Sensors


UV Nitrate Sensors


Applications:  Drinking Water, Wastewater, Industiral Water, Environmental.

Using the NITRATAX eliminates reagents, sampling, and sample conditioning. The UV absorption method is proven, continuous, and precise. The probe is self-cleaning. Life-long factory calibration and full-featured "Plug & Play" with sc Controllers; Nitratax must be connected to an sc controller to form a complete system. 

PROGNOSYS is a predictive diagnostic system that allows you to be proactive in your maintenance, by alerting you to upcoming instrument issues. Know with confidence whether changes in your measurements are due to changes in your instrument or your water.

  • UV Analysis Eliminates Reagents, Sampling, and Sample Conditioning
  • Optional Bypass Panel
  • Choice of Three Models
  • Self-Cleaning Sensor


Accuracy:± 3 % of measured value +0.5 mg/l (with standard solutions)
Ambient Temperature:2 to 40 °C (36 to 100 °F)
Cable Length:10 m (30 ft) fixed cable at sensor
Dimensions (D x L):2.76 in x 13.11 in (70 mm x 333 mm)
Length:13.1 in ( 333 mm )
Measuring Interval:≥ 1 to (fixed values selectable)
Measuring Principle:UV absorption measurement (patented 2-beam technique)
Operating Temperature Range:2 to 40 °C
Power Consumption:2
Pressure Range:≤ 0.5 bar (7psi)
Range:0.1 to 50 mg/L NO2+3 -N (5mm)
Resolution:0.1 mg/L
Response Time:≥ 1 min
Sludge Compensation:yes
Weight:7.94 lbs. (3.6 kg)


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