REED SD-9901 IAQ Meter Datalogger
manual datasheet


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REED SD-9901 IAQ Meter Data Logger

Model: SD-9901

This indoor air quality meter measures CO, O, humidity and temperature. It can record readings from 3 probes simultaneously.

Your Price $995.00 USD
Availability 3 in Stock
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REED SD-9901 Offers

The REED SD-9901 IAQ Meter and Datalogger measures CO, CO2, and O2 as well as humidity and temperature. This meter features galvanic cell CO and O2 sensors, a non-dispersive infrared CO2 sensor, and a precision capacitance humidity sensor. The SD-9901 records readings from 3 probes simultaneously, with data hold and Max/Min record.


  • Non-dispersive infrared CO2 sensor
  • Galvanic cell CO and O2 sensors
  • Precision capacitance humidity sensor
  • Records readings from 3 probes simultaneously
  • Audible alarm setpoint
  • Temperature is measured in °C or °F
  • Easy to read LCD with backlight
  • Data hold and Max/Min record
  • Real time data logger with integral 4GB SD memory card (OPTIONAL)
  • Just plug the SD card into the computer and it downloads directly to EXCEL
  • RS-232 and USB computer interface
  • Auto or manual power off

Ideal for the following applications: Monitors air quality in schools, office buildings, greenhouses, factories, hotels, hospitals, transportation lines and anywhere that high levels of carbon dioxide are generated.

REED SD-9901 Specifications

Sensor Non-dispersive infrared
Range 0 to 4,000 ppm
Resolution 1 ppm
Accuracy ±40 ppm (<1,000 ppm), ±5% (>1,000 ppm)
Sensor Galvanic cell
Range 0 to 1,000 ppm
Resolution 1 ppm
Accuracy ±(5% + 2 ppm)
Sensor Galvanic cell
Range 0 - 30% O2
Resolution 0.1% O2
Accuracy ±(1% + 0.2% O2)
Alarm Threshold <18.0% O2
Sensor Precision capacitive
Range 5 to 95% RH
Resolution 0.1% RH
Accuracy >70%RH: ±(3% rdg + 1%RH)
<70%RH: ±3%RH
Range 0 to 50.0°C (32 to 122.0°F)
Dew Point Range -25.3 to 48.9°C (-13.5 to 120.1°F)
Wet Bulb Range -21.6 to 50°C (-6.9 to 122.1°F)
Resolution 0.1°C/°F
General Specifications
Accuracy ±0.8°C (±1.5°F)
Power Supply 6 x 1.5V UM3/AA batteries
Weight 350g
Dimensions Main Unit: 177 x 68 x 45mm
RH Probe: 197mm Long
CO & O2 Probe: 150 x 38 x 38mm
CO2 Probe: 190 x 38 x 28mm
Click here for complete specifications on the REED SD-9901

What's included with the REED SD-9901

  • SD-9901 IAQ Meter Datalogger
  • Humidity Probe
  • CO Probe
  • CO2 Probe
  • O2 Probe
  • Hard Carrying Case


Click on a category to view a selection of compatible accessories with the REED SD-9901 IAQ Meter Data Logger.

REED TP-01 Thermocouple Wire Probe TP-01
Type K thermocouple wire probe for use with a digital thermometer or multimeter (sold separately) in industrial applications. Terminated with a standard mini-connector. Connector is color coded according to ANSI standards for identification.
$15.00 USD

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REED AP-9VA-110V AC Adapter AP-9VA-110V
Adapter with interchangable plugs.
$20.00 USD

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REED BS-6 Tripod, 3ft BS-6
This tripod secures meters for long-term monitoring.
$59.00 USD

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REED SW-U801-WIN Data Acquisition Software SW-U801-WIN
Data Acquisition Software for Windows® 95 & 98
$69.00 USD

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REED USB-01 USB Cable USB-01
Use this USB cable with any REED meter with an USB port.
$59.00 USD

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Calibration Lab

Customer Reviews