Water Quality

Hach

UVAS plus sc Sensor

Hach’s UVAS plus sc digital UV probe is designed for the “reagent free” determination of organic load (using SAC or spectral absorption coefficient) directly within a sample medium or using a specially designed bypass flow cell.

This self-cleaning optical sensor delivers reliable measurements in near real time.   With its stainless steel housing, this instrument can be deployed within the most challenging sample conditions.

The UVAS plus sc is commonly deployed within the following applications:

• protection of treatment plants from industrial dischargers;
• monitoring shock loads from internal plant processes;
• control of activated sludge processes;
• control methanol feed in BNR based on organic loading;
• final effluent monitoring & monitoring efficiency of UV disinfection .

The UVAS plus sc can be connected to all Hach SC controllers thus providing versatile output options such as:

• 4-20 mA
• Modbus
• RS485
• Profibus
• HART

UV absorbing organic constituents (SAC2540) can be crossed checked on the laboratory DR6000 spectrophotometer.

FEATURES

Continuous, Automatic Early Warning Systems

Use the Hach UVAS plus sc UV Absorbance/Transmittance Sensor to continuously protect plant treatment processes from high influent organic loads. Operators can use the continuous readings of UV absorbance or transmission to watch for sudden changes in organic load that would require alternate treatment procedures.

Control Activated Sludge Processes

Activated sludge processes require precise balancing of organic load, aeration, and nutrients. Continuous trending of the organics in the system with the UVAS plus sc sensor can help operators know how to balance other factors resulting in cost and time savings.

Self-cleaning Wiper System

With the UVAS plus sc sensor submerged in the sample stream, the detector windows are automatically cleaned by a built-in wiper that eliminates surface films or particles that can diminish accuracy.

Monitor Efficiency of UV Disinfection Process

UV light transmittance (UVT) is critical in the delivery of dose in a UV reactor. The delivered dose is determined by, among other things, the UVT of the source water, the intensity of the UV lamps, and the flow rate of the water source. UVT can be affected by many factors, from a simple change in the seasons to storm events. Potential changes in UVT should be considered in a UV disinfection system for optimized dose delivery. Hach’s UVAS plus sc is designed to provide continuous UVT measurement of pre-disinfected source water. Operational costs related to sampling for UVT may be reduced with continuous online measurement. Data can immediately be incorporated into the operation in real time.

Self Diagnostics and Easy Maintenance

Diagnostic routines built into the UVAS plus sc sensor reduce the need for extensive calibration and maintenance. Only semi-yearly inspection and replacement of the wiper and seals is needed.

Specs
Application Drinking Water; Clear water
Cable Length 10 m fixed cable at sensor
Configurations Sensor only
Controller Sensor only
Diameter 70 mm
Length 333 mm
Maintenance Requirements 1 h/month in standard applications
Material Sensor enclosure: stainless steel 316, 1.4571, single sealed body
Wiper axle: stainless steel 1.4104
Cable gland: stainless steel 1.4305
Cable gland seal: PVDF
Profile carrier: stainless steel 1.4310
Wiper arm: stainless steel 1.4581
Wiper profile: Silicone
Measuring window: Suprasil (quartz glass)
Measurement method UV absorption measurement (unique 2-beam technique)
SAC 254 in accordance with DIN 38404 C3
Measuring Interval ≥ 1 min
Measuring Principle UV absorption measurement (patented 2-beam technique)
Measuring Principle 2
SAC 254 in accordance with DIN 38404 C3
Operating temperature range 2 – 40 °C
Parameter SAC
Path Length 50 mm
Pressure Range 0.5 bar
Range 0.01 – 60 1/m
Reference Wavelength 550 nm
Region US
Service Interval 6 months
User Maintenance 1 h/month
Warranty 12 months
Weight 3.6 kg
What’s included? SAC probe, user manual
Models
Various UVAS models are available depending on your requirements.
Please consult with Aqualab before ordering.

Available models include:

  • UVAS sc, 50 mm (Sensor Only)
    Product number# LXV418.99.90002
  • UVAS sc, 1 mm (Sensor Only)
    Product number# LXV418.99.10002
  • UVAS sc, 2 mm (Sensor Only)
    Product number# LXV418.99.20002
  • UVAS sc, 5 mm (Sensor Only)
    Product number# LXV418.99.50002
  • UVAS sc Sensor, 2 mm, with SC200 Controller
    Product number# 2976400
  • UVAS sc Probe, 50 mm, with SC200 Controller
    Product number# 2976500
  • UVAS sc Sensor, 5 mm, with SC200 Controller
    Product number# 2976600
  • UVAS sc Probe, 1 mm, with SC200 Controller
    Product number# 2976700
Downloads
Brochures
UVAS plus sc Brochure - AUS

UVAS plus sc Brochure - AUS

UVAS-Brochure-AUS.pdf
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Manuals
UVAS plus sc User Manual- AUS

UVAS plus sc User Manual- AUS

DOC023.54.03230.pdf
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Additional files
UVAS plus sc Technical Diagram - AUS

UVAS plus sc Technical Diagram - AUS

UVAS-sc-LXV418-Drawing.pdf
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UVAS plus sc Advance Online Instrumentation

UVAS plus sc Advance Online Instrumentation

L2165.pdf
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UVAS plus sc Using UV Absorption to Monitor Organics in Drinking Water

UVAS plus sc Using UV Absorption to Monitor Organics in Drinking Water

DOC030.53.10100.Feb16_Master.pdf
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UVAS plus sc Using SAC in Dairies & Milk Processing

UVAS plus sc Using SAC in Dairies & Milk Processing

SAC-in-Influent-Wastewater-Dairies-Milk-Processing-Plants-2.pdf
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UVAS plus sc Using SAC in the Paper Industry

UVAS plus sc Using SAC in the Paper Industry

SAC-Measure-to-Control-Ozone-System-in-Paper-Industry.pdf
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UVAS plus sc Using SAC254 as an Oxygen Demand Predictor

UVAS plus sc Using SAC254 as an Oxygen Demand Predictor

SAC254-as-Oxyen-Demand-Predictor.pdf
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UVAS plus sc Using SAC254 Measurement Yields Operational Savings in  the Paper Production Ozone System

UVAS plus sc Using SAC254 Measurement Yields Operational Savings in the Paper Production Ozone System

Online-SAC254-Measure-Savgs-Paper-Prod-Ozone-Sys.pdf
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UVAS plus sc Using SAC254 Measurement Provides Rapid Detection of  Load Changes in Dairy Processing Discharge

UVAS plus sc Using SAC254 Measurement Provides Rapid Detection of Load Changes in Dairy Processing Discharge

Online-SAC254-Detect-Chgs-Dairy-Process-Discharges.pdf
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UVAS plus sc Using Organics in Drinking Water

UVAS plus sc Using Organics in Drinking Water

DOC030.53.10098.Jan16_EN-US.web.pdf
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UVAS plus sc Using SAC254 and TOC Measurement of Airport Runoff

UVAS plus sc Using SAC254 and TOC Measurement of Airport Runoff

Continuous-SAC254-Measure-Airport-Runoff-Waters.pdf
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UVAS plus sc Using SAC254 Determination of Organic Pollutants Is Key  in Real-time Wastewater Treatment Process Control

UVAS plus sc Using SAC254 Determination of Organic Pollutants Is Key in Real-time Wastewater Treatment Process Control

Continuous-SAC254-Determtn-Organ-Pollut-Real-time-Ctrl.pdf
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Optional Accessories
  • UVAS plus sc Stainless Steel pole mount kit
    Product number# LZY714.99.53520
  • UVAS plus sc Flow Cell unit (2mm)
    Product number# LZX869
  • UVAS plus sc Flow Cell unit (5mm)
    Product number# LZX867
  • UVAS plus sc Flow Cell unit (5mm) - Clear
    Product number# LZX866
  • UVAS plus sc Replacement Wiper Blades (20 x 50mm) - 10 pack
    Product number# LZX119
  • UVAS plus sc Replacement Wiper Blades (5 x 1mm) - 5 pack
    Product number# LZX148
Software
UVASplus sc Software Update - V3.03

UVASplus sc Software Update - V3.03

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SC1000 Certified Multi-Sensor-DTM Software Package

SC1000 Certified Multi-Sensor-DTM Software Package

Zip file

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