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100
GMP343 Carbon Dioxide Probe for Demanding
Measurements
The GMP343 is available as an open-path diffusion-aspirated model (left) and as a
flow-through model (right).
Features/Benefi ts
▪
Excellent accuracy and stability
▪
Vaisala CARBOCAP® Sensor,
a silicon-based non-dispersive
infrared (NDIR) sensor
▪
A single-beam, dual-
wavelength CO
2
measurement
with no moving parts
▪
Compensation options
for temperature, pressure,
humidity and oxygen
▪
Low power consumption and
heat emission
▪
Designed for outdoor use
▪
Compact and lightweight
Technical Data
Performance
Measurement range options 0 ... 1000 ppm, 0 ... 2000 ppm,
0 ... 3000 ppm, 0 ... 4000 ppm,
0 ... 5000 ppm, 0 ... 2 %
Accuracy (excluding noise) at 25 °C (77 °F) and 1013 hPa after factory
calibration with 0.5 % accurate gases with different range options
0 ... 1000 ppm ±(3 ppm + 1 % of reading)
0 ... 2000 ppm - 0 ... 2 %* ±(5 ppm + 2 % of reading)
*Accuracy below 200 ppm CO
2
not specifi ed for 2 % range option
Noise (repeatability) at 370 ppm CO
2
with no output averaging ±3 ppm CO
2
with 30 s output averaging ±1 ppm CO
2
TEMPERATURE
Effect on accuracy with temperature compensation:
CO
2
range options 0 ... 1000 ppm 0 ... 2 000 - 5000 ppm
0 ... 2 %
Temperature °C (°F) Accuracy (% of reading)
+10 ... +40 (+50 ... +104) ±1 ±1 ±2
+40 ... +60 (+104 ... +140) ±2 ±3 ±4
-40 ... +10 (-40 ... +50) ±3 ±3 ±5
For readings below 200 ppm CO
2
±5 ppm CO
2
Temperature compensation is performed by an integrated Pt1000 element
The Vaisala CARBOCAP
®
Carbon Dioxide Probe
GMP343 is an accurate and rugged probe-type
instrument for ecological measurements. Typical
applications include CO
2
soil respiration, ambient
CO
2
monitoring, plant growth chambers, and
OEM applications.
The GMP343 can output both numerically ltered
and raw measurement data and it can also
compensate the measurement with an internal
temperature measurement and user-set relative
humidity, pressure and oxygen values.
In combination with an MI70 indicator, the GMP343
provides a tool for accurate in-situ measurement.
The MI70 can be used as a display, communication
and data logging device.
Each GMP343 is calibrated using ±0.5 % accurate
gases at 0 ppm, 200 ppm, 370 ppm, 600 ppm,
1000 ppm, 4000 ppm and 2 %. Calibration is also
done at temperature points of -30 °C, 0 °C, 25 °C
and 50 °C. If needed, the customer can recalibrate
the instrument using the multipoint calibration
(MPC) feature allowing up to 8 user-de ned
calibration points.
Carbon Dioxide
4-Carbon-Dioxide-Pages-100-119-Vaisala-Catalog-2011.indd 100 24.10.2011 9.21
101
Ref. B210688EN-B ©Vaisala 2009
This material is subject to copyright protection, with all
copyrights retained by Vaisala and its individual partners. All
rights reserved. Any logos and/or product names are trademarks
of Vaisala or its individual partners. The reproduction, transfer,
distribution or storage of information contained in this brochure
in any form without the prior written consent of Vaisala is strictly
prohibited. All specifi cations — technical included — are subject
to change without notice.
Operating Environment
Temperature
operating -40 ... +60 °C (-40 ... +140 °F)
storage -40 ... +70 °C (-40 ... 158 °F)
Humidity see graph ‘GMP343 Operating Conditions’
Pressure
compensated range 700 ... 1300 hPa
operating <5 bar
Gas fl ow for fl ow-through model 0 ... 10 liters/min
Electromagnetic compatibility EN61326, Generic
Environment
Warm-up time
full accuracy ±0.5 % 10 min
full accuracy 30 min
Technical Data
Inputs and Outputs
Operating voltage 11 ... 36 VDC
Power consumption
without optics heating <1 W
with optics heating <3.5 W
ANALOG OUTPUTS
Current output
range 4 ... 20 mA
resolution 14 bits
max. load 800 Ohm @ 24 VDC, 150 Ohm @ 10 VDC
Voltage output
range 0 ... 2.5 V, 0 ... 5 V
resolution 14 bits (13 bits with 0 ... 2.5 V)
min. load 5 kOhm
DIGITAL OUTPUTS
RS485, RS232
Materials
Housing anodized aluminium
Filter cover PC
IP classifi cation <1 W
Housing (cable attached) IP67
Diffusion fi lter (weather protection) IP65
Diffusion fi lter (sintered PTFE) IP66
Cable connector type 8-pin M12
Weight (probe only) 360 g
Options and Accessories
Wall mount bracket GMP343BRACKET
Mounting fl ange GMP343FLANGE
Standard diffusion fi lter (weather
protection, IP65) +fi lter cover GMP343FILTER
Diffusion fi lter (sintered PTFE
fi lter, IP66) + fi lter cover 215521
Calibration adapter (for the diffusion model) GMP343ADAPTER
Junction box JUNCTIONBOX-8
Probe cables
2m GMP343Z200SP
6m GMP343Z600SP
10m GMP343Z1000SP
PC connection cable, 2m 213379
MI70 connection cable, 2m DRW216050SP
USB adapter (USB-D9 Serial connection cable) 219686
Soil adapter kit for horizontal positioning 215519
Soil adapter kit for vertical positioning 215520
PRESSURE
Effect on accuracy with pressure compensation:
CO
2
range options 0 ... 1000 ppm 0 ... 2000 - 2 %
Pressure (hPa) Accuracy (% of reading)
900 ... 1050 ±0.5 ±1
700 ... 1300 ±1 ±2
Integrated pressure sensor is not included in GMP343
Long term stability see graph below
easy <±2 % of reading / year
moderate <±2 % of reading / 6 months
harsh <±2 % of reading / 3 months
GMP343 OPERATING CONDITIONS
Response time (90 %)
DIFFUSION MODEL
Filter attached Averaging (s) Response (s)
Yes 0 75
Yes 30 82
No 0 <2
No 30 30
FLOW-THROUGH MODEL
Gas fl ow (l/min) Averaging (s) Response (s)
0.3 0 26
0.3 30 44
1.2 0 8
1.2 30 23
For more information, visit
www.vaisala.com or contact
us at sales@vaisala.com
4-Carbon-Dioxide-Pages-100-119-Vaisala-Catalog-2011.indd 101 24.10.2011 9.21
- HUMIDITY / DEW POINT / 1
- PRESSURE / WEATHER 1
- ACC URATE 2
- Humidity 4
- Dew Point 4
- Mounting Options 9
- Graphical Display of 10
- History and 10
- Measurement Trends 10
- Outputs and Power Supply 10
- Options for Every Need 10
- Flexible Installation 11
- For Moderate Humidities 11
- Vaisala HUMICAP® 12
- Performance 12
- Measurement Trends and 12
- Real Time History 12
- 41 (1.6) 13
- 51 (2.0) 13
- 192 (7.56) 13
- 253 (9.96) 13
- 37.5 (1.48) 14
- 79.5 (3.13) 14
- 99.5 (3.92) 14
- Temperature Transmitters 16
- HMP361 for wall mounting 17
- HMP363 for confined spaces 17
- HMP364 for high pressure 17
- HMP365 for high temperature 18
- HMP367 for high humidities 18
- HMP368 for pressurized 18
- Transmitter 22
- Interchangeable Probe 24
- Fast, On-Site Calibration 26
- Measures both Humidity 26
- Resistant to Chemicals 28
- Vaisala INTERCAP 30
- Humidity and Temperature 30
- Transmitter Series HMW80 30
- HVACApplications 32
- Demanding Applications 34
- Unique Warmed Probe 34
- Vaisala HUMICAP® Sensor 34
- Chambers 36
- Probe HMP60 38
- Vaisala HUMICAP 40
- Probe HMP110 40
- Three Probes 42
- MI70 Link 42
- Reliable and Cost-ecient 47
- HVAC Products 47
- Fast and Easy-to-Use 48
- HMK15 Humidity Calibrator 50
- DTR500 Solar Radiation 54
- Versatile Outputs and 61
- (Wireless) Data Collection 61
- Easy Installation 61
- Probe Specifications 62
- Ensure dry 65
- Measure Humidity Directly 66
- DMT345, Accurate in Hot 66
- OEM Applications 70
- Low Maintenance 72
- Dewpoint temperature (°C) 75
- DMT132 Dewpoint Transmitter 76
- DEW POINT 77
- CALCULATED VARIABLES 77
- Indoor Applications 78
- 110 (4 .33) 79
- 85 (3.35) 79
- 33 (1.30) 79
- DSS70A Portable 82
- Sampling System 82
- Sampling Cells for 82
- Pressurized Processes 82
- Online Reliability 86
- Savings Across the Board 86
- Risk-Free, Greener 86
- Solution 86
- The Fruit of Experience 86
- Multiparameter Transmitter 88
- When Moisture is a Problem 89
- Knowledge is Power 89
- Literally 89
- Transmitter Series for Oil 90
- Moisture in Oil 90
- The Vaisala HUMICAP 91
- Hand-Held 91
- R1/2" ISO7/1 92
- Prevent it 95
- Transmitter for Oil 96
- Features/Benefits 100
- Technical Data 101
- 0 ... 2 % 102
- Interchangeable Probes 104
- Demanding OEM Applications 106
- GMM111 Carbon Dioxide Module 108
- Vaisala CARBOCAP 110
- Technology 110
- Two Sampling Methods 110
- Features/Benefi ts 112
- Demand-controlled Ventilation 114
- GMM112 Carbon Dioxide Module 118
- GMM20W Carbon Dioxide Module 120
- Pressure 122
- PTU300 Models 123
- Mechanics 126
- Accessories 126
- Dimensions 126
- IN CONTROLLED ENVIRONMENTS 127
- Take the Lab to the Field 130
- For more information, visit 131
- Standard PTB330TS 132
- PTB210 Digital Barometer 134
- Calculate 137
- Vaisala BAROCAP® 138
- Accuracy and Stability 138
- Applications 138
- Ideal for outdoor 140
- Carefree maintenance 140
- Operating Environment 142
- Available Options 142
- Figure 1 143
- Figure 2 with Process 143
- Valve Actuator and 143
- Test Jacks 143
- Measuring Acoustic 146
- Precipitation 146
- Wind Measurement 150
- Vaisala Service Offering 152
- Accredited Body 153
- Accredited Parameters 153
- Vaisala Filters 154
- Vaisala Filters continued 155
- Vaisala Contact Information 158
- ASIA AND PACIFIC 159
- NORTH AMERICA 159
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