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Typical representation of REED SD-9901 Air Quality Detector Product picture of SD-9901 REED Air Quality Detector for illustration purposes only. Actual product may vary.
Reed SD-9901 features RS232 PC Connection
Reed Sd-9901 operates with three probes plugged in simultaneously
Reed SD-9901 can be easily mounted on a tripod
SD-9901 with carying case and accesories
REED SD-9901

Air Quality Detector

Sale price: $1,295.00
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Buy REED SD-9901 online

Buy this SD-9901 Air Quality Detector manufactured by Reed, proved to be useful when you need a pocket size detector allows you to measure CO2, CO, O2, humidity and temperature. SD-9901 meter can simultaneously records data from three probes and comes with a precision capacitance humidity sensor. The SD-9901 Air Quality datalogger with a built-in clock and calendar can be connected to a computer through the USB/RS232 computer interface or it can store the readings on SD memory card.

Accredited calibration/NIST traceable calibration certificate for REED SD-9901 Air Quality Detector might be available on request (for an extra charge). Please contact us for more info.

REED Air Quality Detector: instrument description

The SD-9901 is a Reed Air Quality Detector used to simultaneously records data from three probes. The Reed SD9901 measures CO2, CO, O2, humidity and temperature and is powered by a high accuracy microcomputer circuit. The Reed meter has data hold, USB interface, record max and minimum reading functions and saves measurements values on SD memory card for further analysis. The SD-9901 IAQ Meter Datalogger is an ideal Reed instrument especially designed to be used for monitoring the quality of air in factories, hotels, schools, office buildings or greenhouses.

REED SD-9901 Features

  • No extra software needed, just plug the SD card into the computer
    and it downloads directly to EXCEL
  • Simultaneously records data from three probes
  • Meter can switch to a Manual Datalogging
  • Measures CO2, CO, O2, Humidity, and Temperature
  • Non-dispersive infrared CO2 sensor
  • Galvanic cell CO and O2 sensors
  • Precision capacitance Humidity sensor
  • Real time SD memory card datalogger with a built-in clock and calendar
  • Sampling time set from 2 seconds to 8 hours
  • Easy to read LCD with backlight
  • Auto power off or manual power off
  • Data hold, record max. and min. reading
  • Alarm setting with beeper
  • High accuracy microcomputer circuit
  • Power by UM3/AA (1.5 V) x 6 batteries
  • USB/RS232 Computer interface
  • Separated probe for easy measurements of multiple environments.

REED SD-9901 Specifications

  • CO2
    Sensor     Non-dispersive infrared
    Range     0 to 4,000 ppm
    Resolution     1 ppm
    Accuracy     ±40 ppm (<1,000 ppm), ±5% (>1,000 ppm)
  • CO
    Sensor     Galvanic cell
    Range     0 to 1,000 ppm
    Resolution     1 ppm
    Accuracy     ±(5% + 2 ppm)
  • O2
    Sensor     Galvanic cell
    Range     0 - 30% O2
    Resolution     0.1% O2
    Accuracy     ±(1% + 0.2% O2)
    Alarm Threshold     <18.0% O2
  • Humidity
    Sensor     Precision capacitive
    Range     5 to 95% RH
    Resolution     0.1% RH
    Accuracy     >70%RH: ±(3% rdg + 1%RH); <70%RH: ±3%RH
  • Temperature
    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

How to use Air Quality Detector (SD-9901)

Operating instructions
This Reed SD-9901 Air Quality Datalogger are able to operate with three probes plugged in simultaneously. These probes are: the Humidity, CO2, and either the O2 or the CO Probe. During the operations the meter will datalog all three values and will display on the meter's LCD only one at a time. To start using the meter plug in the Humidity, CO2, and either the O2 or the CO Probe into the sockets. Turn on the meter by pressing the Power Button. To turn the meter off, hold the Power Button for over 2 seconds. Press the Function Button to scroll through the measuring functions:

  • rH: Humidity/Temperature
  • dP: Dew point Temperature
  • _ET: Wet bulb Temperature
  • CO: CO/Temperature
  • O2: O2/Temperature
  • CO2: CO2/Temperature

Reed Sd-9901 measures CO2, CO, O2, Humidity, and Temperature

The selected measurement function will be saved as the default.

How to use Data hold function
During the measurements, the Reed SD-9901 Air Quality Detector are able to hold on the screen the measured value. For using that, just press the Hold Button once and a HOLD symbol will appear on the Display. Press the Hold Button once again will release the data hold function.

How to use Data Record (Max., Min. reading)
The data record function records the maximum and minimum readings. Press the REC Button once to start the Data Record function and a “REC” symbol will appear on the display. With the “REC” symbol on the display. Press the REC Button once, and a ”REC. MAX.” symbol along with the maximum value will appear on the display. Press the REC Button again, and a “REC. MIN.” symbol along with the minimum value will appear on the display. To delete the minimum value, press the Hold Button once, and the display will show a “REC.” symbol only and execute the memory function continuously.

Ordering info

As a canadian distributor of REED Instruments products we stock most of these Gas Detectors for same day shipping. To enquire on the REED SD-9901 Air Quality Detector availability and current list price please contact us.

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