1.
New Smart
CO2 Probes
and Indigo 200
Transmitter
Maria Uusimaa
Product Area Manager, Vaisala

2.
Page © Vaisala
Vaisala’s New Indigo CO2 Probes
 Stand alone CO2 measurement
probes
 ppm level measurements up to
10 000 ppmCO2
 % level measurements up to
20 %CO2
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2002

3.
Page © Vaisala
Vaisala’s New Indigo Hosts
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2003

4.
Page © Vaisala
The CARBOCAP® Technology
 Optical, infra-red measurement technology
 Single-beam, dual-wavelength NDIR technology
 The amount of infrared light passing through the gas is measured at
two discrete wavelengths:
 the absorption wavelength (4.3 µm), where CO2 absorbs strongly
 the reference wavelength (3.9 µm), where CO2 has no absorption
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2004
Vaisala CARBOCAP® sensor
One IR source, one tunable filter CO2 and reference wavelengths
= true referencing!

5.
Page © Vaisala
2nd-Generation CARBOCAP® Technology
 Miniature filament light bulb replaced with a
microglow – a micromechanical component
manufactured by Vaisala
 Compared to a filament lamp it has:
 Longer lifetime: >15 years
 Low power consumption
 Stable light output
 Fast response at startup
 Single-beam, dual-wavelength NDIR measurement
technology in a compact structure
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2005
Schematic of the
GMP252 sensor
operating principle

6.
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2006
CARBOCAP® technology with
continuous internal referencing
1. Reliability
– Only one light source and one detector - and a tunable
filter - needed
2. Stability
– Tunable filter enables measuring continuously a CO2
signal and a reference signal – ensures a stable
measurement in all conditions
3. Tolerates harsh environments
– Due to internal referencing minimal maintenance in harsh
environments is needed

7.
Page © Vaisala
Indigo 201 and CO2
Probes
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2007
 Display and non-display versions
 Probe directly attached or with remote cable
 Supports one probe, detachable without
opening cover
 Plastic, IP65 classified housing
 Operating temperature -40 ... +140 °F, with
display -4...+140 °F
 Analog outputs (mA and V), 2 relays
 Wireless configuration interface for easy
access

8.
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Wireless Configuration
Interface
 Easy access with any device
with a WLAN connection and a
browser – typically a mobile
phone, tablet or a laptop
 Temporary viewing of
measurement data in numeric
and graph views
 Changing the settings of Indigo
201 and attached probe
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2008

9.
2017-02-08 AHR Expo: New CO2 Probes and Indigo 2009

10.
Page © Vaisala
Future Launches
 Indigo 201 first in the series of releases
 Probe selection will be widened for
humidity and temperature
measurements
2017-02-08 AHR Expo: New CO2 Probes and Indigo 20010