UV254 Organics Monitor
UVM5000
Automatic cleaning system
dual sample feed capability
continuous automatic calibration
The UVM5000 provides online continuous organics monitoring utilizing a 254 nm ultraviolet light source. The amount of light absorbed provides an ongoing indication of natural organic matter (NOM) in a flowing sample and serves as a continuous surrogate measurement for total organic carbon (TOC). More specifically, UV254 is the best detector of aromatic or reactive organics which when combined with chlorine, can form disinfection by-products (DBPs).
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Overview
The UVM5000 provides online continuous organics monitoring utilizing a 254 nm ultraviolet light source. The amount of light absorbed provides an ongoing indication of natural organic matter (NOM) in a flowing sample, and serves as a continuous surrogate measurement for total organic carbon (TOC). More specifically, UV254 is the best detector of aromatic or reactive organics which when combined with chlorine, can form disinfection by-products (DBPs).
The patent pending Ortho-Beam technology provides many significant advantages while maintaining affordability. The monitor’s unique ability to automatically detect and compensate for UV lamp fluctuations and quartz fouling minimizes losses in accuracy over time, and significantly reduces maintenance.
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Q & A’s
Specifications
Features
Description
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Range
0 – 100% UVT, 0 – 2 UVA
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Accuracy
± 0.5% FS
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Repeatability
± 0.1% UVT
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Resolution
0.1% UVT, 0.001 UVA
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Units
cm-1
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Path Length
10 mm
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Sampling Time
10 seconds
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Flow Rate
300 – 1000 mL/min.
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Calibration
Ortho-Beam technology allows continuous automatic calibration during operation
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Cleaning
Significantly reduced cleaning requirements due to Ortho-Beam technology
Automatic cleaning (optional) -
Self Diagnostics
Continuous detection of leaks, lamp output, humidity, temperature, and electrical fault
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Operator Interface
Five push-button menu system
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Display
4 line x 20 character backlit LCD
Multi-color indicator light for system alarms and warnings -
Alarms
Dry-contact terminals allow operator configurable alarms for:
• High and low UVT/UVA setpoints
• Low lamp output
• Leak detection
• Electrical and system fault -
Humidity Control
Humidity sensor with large regeneratable desiccant system
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Outputs
• 4-20 mA output configurable to either UVT or UVA
• Dry-contact terminals for alarm conditions
• RS232 for data logging via PC -
Wavelength
253.7 nm
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Light Source
Low pressure mercury UV lamp
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Lamp Life
2 year expected
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Dimensions
14” H x 12” W x 8” D
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Enclosure
Nema 4X, wall mountable
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Fluid Connections
1/4” tube compression in/out
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Electrical
24VDC 20W power adapter (accepts 90-250 VAC 50/60 Hz)
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Storage Temp
-4º to 140º F (-20º to 60º C)
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Operating Temp
32º to 113º F (0º to 45º C)
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Warranty
2 year limited warranty
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Options
• Dual Feed
• Automatic chemical cleaning
• Open channel / Non-pressurized pump system
HydroACT Features
HA2
HA4
HA8
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Sensor limit*
2
4
8
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Analog output limit*
2
4
8
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Relay limit*
4
8
16
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Digital Input limit*
4
8
16
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Isolated universal I/O
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•
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Nema 4X/IP65
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•
•
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Wall & panel mount
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•
•
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Multilingual
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•
•
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High resolution display
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•
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Graphical trending
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•
•
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On/Off threshold control
optional
optional
optional
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Advanced control (e.g. PID)
optional
optional
optional
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Color display
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•
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Customizable data logs
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•
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MicroSD card download
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Remote (Internet) access
optional
optional
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PROFIBUS, Modbus
optional
optional
*Sensors, I/O, and relays are all optional and must be specified at time of ordering.
Downloads
| Title | Category | Upload Date | File Size | Download |
|---|---|---|---|---|
UVM5000 Manual v2.1
|
Organics Monitor (UV254), UVM5000 | Nov 3, 2025 | 1 MB | Download |
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UVM5000 Datasheet
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Organics Monitor (UV254), UVM5000 | Nov 3, 2025 | 1 MB | Download |
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Chemtrac UV Auto Clean Manual v2.1
|
Organics Monitor (UV254), UVM5000 | Oct 29, 2025 | 798 KB | Download |
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Chemtrac Dual Feed Manual v2.1
|
Organics Monitor (UV254), UVM5000 | Oct 29, 2025 | 574 KB | Download |