Select Langan CO2 Measurer Data Sheet for viewing or downloading as a .pdf document.

Examples of actual data gathered using this instrument.

Trace of CO2 over a day with a 'running' 8-hour average.
Dual traces of CO2 over an entire week. Dropout occured when batteries were depleted.

The Langan CO2 Measurer is a complete package that combines long-life, highly reliable, electrooptical sensors produced by Englehard Corporation with the compact and field-tested portable DataBear™V Measurer data acquisition system. Calendar timing and signal-interface electronics optimize the combination. Software is included to read and reset the instrument, to display the results and to translate into almost any computer format. Batteries and interface cables are included. This portable instrument can be used on receipt!

Langan CO2 Measurer variations are available in FOUR configurations:

• A portable, long-term CO2 + Temperature Model T16, The Langan CO2 Measurer
• This configuration with CO Sensor added, Model L56, The Langan CO/CO2 Measurer
• This configuration with CO and humidity, Model L76, The Langan Indoor Air Quality Measurer
• A data-acquisition interface with the Englehard Telaire™, ModelL16.

All include temperature sensors, as well Readout Software is included for either MS-DOS or MacOS Computers.

The CO2 Monitor itself is a stand-alone, portable, IR-based, handheld instrument that is included within the rugged enclosure provided in the Langan configuration. It can be used independently, without attachment to the data acquisition capability, to gather momentary readings. When attached to the data acquisition hardware, it becomes a CO2 instrument with memory and with added sensor capabilities for indoor air quality observations, if these are selected.

This series provides a unique freedom to gather CO2 data anyplace!

Range

CO2 Sensor: 0 to 4000 ppm

Temperature: 0 to 128 °F (-18 to 53 °C)

Resolution:

5 ppm to 20 ppm

0.5 °F, 0.3 °C (8-bit, 5 mV)

Accuracy:

(CO2) greater of ±5% reading or ±50 ppm

(temperature) ± 1°F

Size: about 6 by 8 by 6 in (15 by 20 by 15 cm)

Weight: about 5 pounds (2 kg), includes batteries

Interfaces:

Power connection uses a coaxial power plug from batteries.

Data are transferred using a phone-handset plug

to 8-pin DIN (Macintosh) or 9-pin D (IBM).

Sensor connects by screws to a removable plug.

LED flashes for power-on and data transfer.

Electrical:

6 VDC; 20 mA, average; 100 mA, peak (normal usage)

separate AC transformer or AA cells can support CO2

Software Settings:

(MacOS Sense-Your-World! Software included)

(MSDOS IBearM Reader Software optional)

Sampling Frequency:

128 hertz, preset mode

20 hertz, real time mode

one second or longer, continuous mode

Storage Capacity: up to 10,240 samples (dual CO +T)

Collection Capacity:

from hours to months

Stores three user-created texts, time zone and date.

Save as compact files, ASCII text, or PICT graphics.

Gas Law Correction: elevation adjustment, temperature compensation

Calibration: uses bottled span gas; lasts for years

connection for applying CO2 is supplied

 

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More Examples of Gathered Data
Frequency distribution and accumulated frequency distribution of CO2 measurered over an entire week.

 

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Thanks to Susan Langan < LPI home page > for originally creating this page.
Specifications are subject to change.

© 1998-2001 Langan Products, Inc. DataBear, DataBear logo, Sense-Your-World!, IBearM are trademarks of Langan Products, Inc.
Telaire of Engelhard Corp, CiTicel of City Technology Ltd. Macintosh, MacOS of Apple Computer, Inc. Prices subject to change. July 1998

Page established in August 1998; last update August 2001.