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Specifications

Method of Detection

Single cell NDIR with no moving parts

Ranges Available

481 - 0-1, 0-5, 0-10, 0-20, 0-30, 0-50, 0-100% CO

Resolution

0.1% CO on % versions, 1 PPM CO on PPM versions

Accuracy & Repeatability

1% of full scale

Drift

Less than 2% of full scale per month

Response Time (T-90)

Less than 15 seconds

Ambient Temperature Range

40 to 122°F (5 to 50°C), Lower temperatures (-5°C, -20°F) with Cold Weather Package

Linearity

±1% of full scale

Size & Weight

Physical data will vary depending on enclosure style and options required

Power

115 VAC, 60 Hz
220 VAC, 50 Hz

Output Options

4-20 mA into 500 ohms non-isolated standard
Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs

Alarms

High and/or low alarm contacts available, relay contacts SPDT 5A @ 220 VAC rating
Low flow alarm

Analyzer Type

CO Analyzer

Hazardous Area Rating Options

Class 1, Div 1, Grp A-D Hazardous Area Rating


Applications
    For continuous analysis of carbon Monoxide (CO) in process gas streams using an infrared detector. Percent and PPM levels available as Models 481 and 481L respectively.




Features
  • Percent or PPM levels CO by infrared
  • Detector is sensitive, very reliable, and non-depleting
  • Bright digital readout, 4 - 20 mA outputs
  • Fast response (T90 - less than 15 seconds)
  • Microprocessor control for push button calibration
  • Easy-to-maintain modular layout
  • Built in sample pump, flowmeter and filters




Options
  • Hi/Low gas, low flow, and diagnostic alarms available
  • Isolated analog, RS232, RS485, MODBUS and Ethernet outputs available
  • Sample conditioning systems available for removal of moisture, acidic gas and dust
  • Cabinet purge system available for use in hazardous areas
  • One-step 'cal-now' button with touch screen LCD display
  • Full automatic calibration with touch screen LCD display
  • Cold weather package for operation to -20°C (-5 °F)
  • Cabinet coolers can be fitted to most models
  • Sensors mounted in temperature controlled heated box to improve accuracy.
  • High temperature filters and probes




Calibration
  • Easily zero checked on ambient air
  • Span using a known CO in nitrogen (N2) calibration gas.
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