Outline

Radiosonde
CO2 sensor

Reference gases

The world-first balloon-born CO2 sonde, thecombination with GPS radiosonde and small NDIR
type CO2 sensor, was developed to measure thevertical profile of CO2. CO2 sonde can be operated
with conventional weather balloon regardless of theobservation site (e.g., isolated areas or remoteislands), weather condition and time (day/night).
CO2 concentration is measured in the troposphere(0—10 km) with about 300 m vertical resolution.
Adoption of NDIR senor facilitates easy preparation
for preflight and operation. Furthermore, theembedded two reference gases achieve highmeasurement accuracy of less than 1ppm.
CO2 sonde has been utilized for 1) Validation withother observation method such as aircraft, tower orsatellite (GOSAT etc.), 2) Evaluation of CO2

Features:absorption/emission in the forest, or 3) Long-term
CO2monitoring for climate change prediction andglobal warming prevention activity, etc.

Adopting high accurate NDIR type CO2 sensor● Achieved 1 ppm measurement accuracy by loading two reference gases with CO2 sensor● Lightweight package, below 2 kg, can be operated with weather balloon● Balloon-borne instrument usable under any weather condition, day& night and in any place● Compatible with ground receiving system RD-08AC and sounding software MGPS-R●Sounding Examples

Specifications
Sensor method

NDIR(Non Dispersive Infrared)
4.0 and 4.3 micro m

CO2

1Range350 ppm to 450 ppm *Resolution

0.1 ppm2

Vertical resolution

150 to 300 m *Time resolution

80 sec (default)

Accuracy< 1 ppm (0 to 5,000 m)< 1.5 ppm (5,000 m to 10,000 m)

Operation time

< 60 min *3OutputPump

PowerGas packData25 byte/sec

Baud rate

9,600 bps, 8, 1, nonFlow rate

300 ml/min

Type

PistonVoltage

4.5VDC x 3Current

1,000mA approx.

TypeLithium AA x 9Volume8lx2

Dimensions and Dimensions
WeightWeight346(W) x 243(D)x 290(H) mm
2.0 kg approx.

*1) : The range depends on the density of two kinds of standard gas.
*2) : The vertical resolution depend on the rise speed of the radiosonde. The recommended rise speed is 3m/s.
*3) : The operation time depend on size and the quantity of a carried standard gas pack. The recommended usage is 8 liters of standard gas into an aluminum gas pack of 20liters.

Block Diagram

Dimensions
Unit (mm)Cautions● For safe and correct usage, please read the "Operation Manual" prior to the use of the products.
● The specifications and appearances might be changed without prior notice, which please understand.
● The specifications shown in the catalog are of our standard products. We are pleased to customize it to meet customer's requirements. For the details, pleasecontact us.
● Please understand in advance that our company cannot assume the responsibility of any claims made by the third party about any monetary damages or any

loss of profits arising out from the use of our products.
● The color of the product photography on catalog might be different from that of actual product because of printing.

1-1, Toyosu 3-chome,Koto-ku, Tokyo 135-8115, Japan
Tel: +81-3-6204-8254 Fax: +81-3-6204-8888
http://www.meisei.jp/sonde/
Global Marketing Gr.
The specifications this catalog are current as of September 2018
No. MSPA4‐034 M1809