Chloramination and nutrient monitoring

ChemScan® mini UV-254 Percent Transmittance Analyzer


The single parameter in-line analyzer family from ASA Analytics utilizes years of ChemScan® experience and proven technology to provide reliable and accurate analysis of water and waste water.

This device has been designed from the ground up to reduce maintenance requirements, includes large ID sample tubing to minimize plugging and only needs quarterly reagent refills.


  • High Reliability
  • Low Capital Cost
  • High Accuracy
  • Low Operating Cost


  • Municipal Water and Wastewater
  • Industrial Water and Wastewater


  • UV-LED Light Source
  • Low Maintenance
  • Automatic Zeroing and Cleaning
  • Proven Sample Handling with Large I.D. Flow Paths
  • Simple Field Adjustable Calibration
  • Direct Photodiode Detection
  • Temperature Stabilized Light Source and Detector
  • Sealed Electronics Enclosure
  • Sealed Flow Cell


  • Continuous, Real Time Analysis of Contstant Flow Sample Stream
  • Isolated Analog Output
  • High and Low Alarms
  • Diagnostic Alarms
  • LED Digital Display
  • Universal AC Power Options
  • Data Log

Analyzer Documents:

Demo Video
Installation Video
Product Photo

mini UV-254 Features Brochure
mini UV-254 Installation Diagram
mini UV-254 Piping Diagram
mini UV-254 Technical Specifications

mini UV-254 Procurement Specs.
O&M Manual
Sample Extraction System
Full mini Catalog


Range: 1.0 - 100% T, 0.0 - 2.0 AU
Accuracy: 2% of value or 2x detection limit (whichever greater)
Cycle Time: Continuous
Environment: 5 - 50 degrees C (method dependent)
Power: 100 - 240 VAC, 50 W
Enclosure: NEMA 4x
Sample Requirements:
5 - 20 psi
Maintenance: Monthly replenish zero/clean solution
Relay Contacts: 1 SPDT Concentration, 1 SPDT Programmable
Serial Interface: RS-232 Maintenance Port
Analog Output: Isolated 4-20 mA





ASA Analytics, 2325 Parklawn Drive, Suite I, Waukesha, WI 53186
Phone: 262-717-9500 | Fax: 262-717-9530
| Toll Free: 800-665-7133


ASA Analytics is your source for Water Analyzers, Wastewater Analyzers, Analytical Instruments, Spectrophotometric; Titration; Analytical Instruments, Ultraviolet (UV); Analytical Instruments, Water/Wastewater; Chloramine sensor; Continuous Flow Analyzer; Groundwater Treatment, Monitoring Instrument; Instrumentation Toxicity; Instrumentation, BOD; Instrumentation, Chlorine Residual; Instrumentation, Chlorine Testing; Instrumentation, COD; Instrumentation, TOC, TOD; Instrumentation, Water Quality Monitoring; Monitoring Systems; Multiparameter Sensors; Respirometers; Security Sensors & Systems; Water Analysis Products

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