Nuvair Pro Duo Alarm Analyzer Series

Starting at $1,750.00

The Nuvair Pro Duo series of gas analyzers come in different pairings to match your multigas analyzing requirements. Mounted in a rugged, water-resistant case, the Pro Duo has two user-programmable audible and visual alarms for each gas sensor. Powered by a rechargeable lithium-ion battery (or 24V external DIN power for 9599-DP), the Pro Duo comes in the following configurations: Carbon Monoxide/Carbon Dioxide [CO/CO2: SKU 9598-LB], Oxygen/Carbon Dioxide [O2/CO2: SKU 9618-LB], Oxygen/Carbon Monoxide [O2/CO: SKU 9623-LB], or Carbon Monoxide/Moisture [CO/H2O: SKU 9599-DP].
Grouped product items
Product Name Qty
Nuvair Pro Duo O2/CO2 Alarm Analyzer | 9618-LB
Nuvair Pro Duo CO/CO2 Alarm Analyzer | 9598-LB
Nuvair Pro Duo CO/H2O Alarm Analyzer | 9599-LB

The Nuvair Pro Duo series of multigas alarm analyzers are mounted in rugged, water-resistant cases. Each sensor has two user-programmable audible and visual alarms. The internal sensors are plumbed together to monitor a single input. The analyzer has visual and optional audible alarms for each gas.

An audible alarm sounds if any alarm set point is reached. When in alarm, the analyzer's analog output can activate an optional relay that shuts down compressors automatically, sounds a remote alarm, or activates emergency backup systems. Comes equipped with a rechargeable lithium-ion battery and universal 110/230-volt charger.

Pro Duo Series Selection Guide

SKU 9598-LB 9618-LB 9623-LB 9599-DP
Carbon Monoxide (CO) Sensor X   X X
Carbon Dioxide (CO2) Sensor X X    
Oxygen (O2) Sensor   X X  
Moisture (H2O) Sensor       X
Rugged, Water-Resistant Carrying Case with Black Lid X X X  
Rugged Water-Resistant Mounting Case with Clear Lid       X
Lithium-ion Battery Powered with 110/220V Recharger X X X  
External 24V DIN Power       X


  • Programmable alarm thresholds
  • Audible and visual alarms
  • Fast response
  • Compact water-resistant container
  • Designed to test breathing gases
  • Easy to operate
  • Reliable and accurate
  • Optional relays for external alarm or compressor control


  • Audible and visual alarms for oxygen (O2), carbon monoxide (CO), carbon dioxide (CO2), and/or moisture (H2O)
  • Temperature compensated sensors
  • User replaceable battery and sensors
  • Low battery warning indicator
  • Factory reset

CO2 Analyzer

  • 50 ppm resolution from 0 to 1000 ppm, then 100 ppm up to full scale
  • 0-2000 ppm range

O2 Analyzer

  • 0-100% range oxygen monitor
  • 36-month electrochemical sensor
  • ±1% accuracy

CO Analyzer

  • 0-100 ppm range CO monitor
  • 18-month electrochemical sensor
  • ±1% accuracy

Moisture Monitor

  • Audible visual alarms for high moisture content in filters
  • Warning light for filter changes

Replacement Sensors

All Nuvair Pro Duo analyzers are custom-made at the time your order is placed. If a rush order is required, please contact the sales team for estimated lead times.

WARNING: Never expose gas sensors to pressure or you may cause damage and/or false readings. Damaged sensors will not provide accurate gas analysis. Most gas analyzers can be used to analyze a regulated gas sample flow, the contents of a gas cylinder, or the flow from a regulator. The flow rate of gas must equal 1-5 L/min. To produce this flow, a Flow Restrictor and Regulator may be required. A faulty Flow Restrictor can lead to a false analyzer reading. Flow Restrictors should be regularly tested with a Flow Meter. Inaccurate gas analysis can lead to serious personal injury or death.