Vaisala Handheld CO₂ Meter GM70 Vaisala Handheld CO₂ Meter GM70
Vaisala Handheld CO₂ Meter GM70
Vaisala Handheld CO₂ Meter GM70
Vaisala Handheld CO₂ Meter GM70
Vaisala Handheld CO₂ Meter GM70

Vaisala GM70 Handheld CO₂ Meter – Discontinued

Vaisala GM70 Handheld CO₂ Meter – Discontinued

The Vaisala GM70 was a portable carbon-dioxide meter for diffusion measurements, pump sampling, data logging and field checking fixed CO₂ instruments.

  • Discontinued product; not recommended for new purchases
  • GMP221 probes for percentage-level CO₂ up to 20%
  • GMP222 probes for ppm-level CO₂ up to 10,000 ppm
  • GMH70 diffusion handle or GM70PUMP sampling system
  • MI70 indicator with numerical, graphical and logging functions
  • Used for field checking compatible fixed Vaisala CO₂ instruments
  • Use Vaisala Indigo80 for new portable measurement systems

Legacy Portable CO₂ Measurement System

The Vaisala GM70 combined an MI70 handheld indicator with a GMP221 or GMP222 CARBOCAP® probe. It was used for portable CO₂ spot checks, short-term data logging, diffusion measurement, pump-aspirated sampling and comparison with compatible installed transmitters.

The short GMP221 probe covered percentage-level ranges, while the longer GMP222 covered ppm-level ranges. The probe could be fitted to the GMH70 diffusion handle or installed in the GM70PUMP sampling unit when gas had to be drawn through tubing or an equipment sampling port.

Discontinued model: GM70, GMP221 and GMP222 should not be specified for a new system. Select the replacement according to concentration and sampling method: Indigo80 with GMP80P for portable pump sampling at percentage-level CO₂, or Indigo80 with GMP252 for portable ppm-level diffusion measurement.

Legacy GM70 Probe and Sampling Options

ComponentFunctionLegacy selection
MI70 Portable display, configuration and data logging Main indicator supplied with GM70 configurations
GMP221 Short probe for percentage-level CO₂ 0–2%, 0–3%, 0–5%, 0–10% or 0–20%
GMP222 Long probe for ppm-level CO₂ 0–2000, 0–3000, 0–5000, 0–7000 or 0–10,000 ppm
GMH70 Diffusion-sampling handle Direct spot measurement in accessible locations
GM70PUMP Pump-aspirated measuring chamber Sampling through tubing and checking difficult-to-access instruments
GMA70 Connection cable for selected fixed CO₂ instruments Allowed GM70 and the installed transmitter reading to be viewed together

Legacy GM70 Measurement Specifications

SpecificationGMP221GMP222
Concentration type Percentage-level CO₂ ppm-level CO₂
Available ranges 0–2%, 0–3%, 0–5%, 0–10% and 0–20% 0–2000, 0–3000, 0–5000, 0–7000 and 0–10,000 ppm
Accuracy at +25 °C and 1013 hPa ±(1.5% of range + 2% of reading) ±(1.5% of range + 2% of reading)
Response time Approximately 20 seconds, T63 Approximately 30 seconds, T63
Warm-up Approximately 30 seconds; 15 minutes to full specification
Long-term stability Less than ±5% of full scale over two years
Sensor Vaisala CARBOCAP®

Legacy Operating and Mechanical Specifications

SpecificationDiffusion configurationGM70PUMP configuration
Operating temperature −20 to +60 °C +15 to +40 °C
Operating humidity 0 to 100 %RH, non-condensing
Operating pressure 700 to 1300 hPa
Diffusion air velocity 0 to 10 m/s Not applicable
Time to full specification 15 minutes 30 minutes
Protection GMH70 handle IP65 GM70PUMP IP54
Approximate weight with probe 230 g 700 g
Probe cable length Approximately 1.9 m

Select the GM70 Replacement

Legacy useRecommended starting pointSelection note
GM70PUMP with GMP221 Indigo80 with GMP80P Closest portable pump-sampling arrangement for percentage-level CO₂
GMH70 with GMP221 Indigo80 with GMP251 Percentage-level diffusion measurement from 0 to 20% CO₂
GMH70 with GMP222 Indigo80 with GMP252 ppm-level diffusion measurement from 0 to 10,000 ppm and up to 30,000 ppm with reduced accuracy
GM70 checking an incubator Indigo80 with GMP80P Pump sampling through an incubator access port or sample tube
GM70 checking a compatible smart probe Indigo80 with a suitable reference probe Confirm the installed instrument and cable compatibility before ordering
Product information Explore Vaisala Indigo80 and GMP80P   Explore Vaisala GMP251   Explore Vaisala GMP252

GM70 and Indigo80 Comparison

Selection pointGM70Indigo80 system
Lifecycle Discontinued portable platform Replacement handheld platform for new portable measurement systems
Indicator MI70 Indigo80 colour handheld indicator
CO₂ probes GMP221 or GMP222 GMP80P, GMP251 or GMP252 according to range and sampling method
Connected devices Two MI70 ports Up to two compatible probes or transmitters
Pump sampling GM70PUMP GMP80P incorporating GMP251 measurement technology
Data logging MI70 internal logging and MI70 Link transfer Large internal logging capacity with USB-C data transfer
Configuration and calibration MI70 menus and legacy accessories Guided handheld functions and integration with Vaisala Insight
Important limitation Separate GMP221 and GMP222 ranges No single probe duplicates every legacy GM70 range and sampling arrangement

GMP80P Portable Pump Sampling

GMP80P combines a pump-assisted sampling body with GMP251 percentage-level CO₂ measurement. Connected to Indigo80, it is designed for portable sampling from incubators and for spot checking compatible fixed CO₂ instruments.

  • Indigo80 powers the GMP80P and displays the measured CO₂ value.
  • The sampling inlet accepts the appropriate stainless-steel, polyurethane or Nafion™ arrangement.
  • A condensation window helps the operator check whether liquid is present in the sampling path.
  • Indigo80 can log the measurement and support calibration or adjustment of the incorporated GMP251 probe.
  • Vaisala Insight PC software can provide configuration, diagnostics and calibration functions.

Existing GM70 Support and Migration Checks

  1. Record the MI70 indicator, probe, handle or pump and all cable item codes.
  2. Identify whether the existing probe is GMP221 or GMP222 and record its calibrated range.
  3. Confirm whether measurements are made by diffusion or pump sampling.
  4. List every fixed instrument that is checked with the GM70 and the cable used for each one.
  5. Confirm whether ppm or percentage-level CO₂ is required.
  6. Review sampling-tube length, material, volume, moisture and required response time.
  7. Select the Indigo80 probe or GMP80P configuration for the actual measurement task.
  8. Do not assume old GM70 cables connect directly to Indigo80 or the replacement probe.
  9. Plan a reference comparison before retiring a working legacy system.

Vaisala GM70 Replacement Support in Malaysia

Seacom Process Instruments supports users of the discontinued Vaisala GM70 Handheld CO₂ Meter in Malaysia and can assist with migration to an Indigo80-based portable measurement system.

Our team can review the existing GM70, GMP221 or GMP222 range, diffusion handle, GM70PUMP, sampling tubes and instrument-checking cables. We can then recommend Indigo80 with GMP80P, GMP251 or GMP252 according to the concentration range, sampling method and instruments being checked.

Replacing a GM70? Send us clear photos of the indicator, probe labels, handle or pump and cable item codes, together with the CO₂ range, sampling method, applications and fixed instruments you need to check.

Download

  GM70 Catalogue   (194.06k)

  GM70 Order Form   (65.6k)

  Indigo80 Catalogue   (369.55k)

  GMP80P Catalogue   (435.39k)


Specific References

12 other products in the same category:

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Indigo200 Series Transmitters for Vaisala smart probes for Vaisala Smart Probes

Vaisala Indigo200 Series Transmitters

Vaisala Indigo200 Series Transmitters

The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.

  • Indigo201 with three analog outputs and two relays
  • Indigo202 with Modbus RTU and two relays
  • Colour display with numerical and graphical views
  • IP65 enclosure for industrial measurement applications
Duct Mounted CO2 Transmitter GMD10

Vaisala GMD110 High-Accuracy Duct CO₂ Transmitter

Vaisala GMD110 High-Accuracy Duct CO₂ Transmitter

The Vaisala GMD110 measures carbon dioxide directly inside ventilation ducts for precise HVAC control and demand-controlled ventilation.

  • CO₂ measurement range from 0 to 10,000 ppm
  • Accuracy of ±40 ppm from 0 to 3000 ppm
  • 4–20 mA, 0–5 V, 0–10 V or Modbus RTU output options
  • Analogue scaling of 0–2000, 0–5000 or 0–10,000 ppm
  • Fast response with less than two minutes to full specification
  • Heated CARBOCAP® sensor head helps prevent condensation
  • IP65 enclosure for demanding duct installations
  • Traceable calibration certificate included
CO2, Temperature and Humidity Transmitter Series GMW90

Vaisala GMW90 Series CO₂, Temperature and Humidity Transmitters

Vaisala GMW90 Series CO₂, Temperature and Humidity Transmitters

The Vaisala GMW90 Series provides stable wall-mounted carbon-dioxide and temperature measurement, with optional humidity, for demanding HVAC and building-automation applications.

  • Carbon-dioxide measurement from 0 to 5000 ppm
  • CO₂ accuracy up to ±(30 ppm + 2% of reading)
  • Temperature measurement from −5 to +55 °C
  • Optional HUMICAP® relative-humidity measurement from 0 to 95 %RH
  • Voltage, current or Modbus RTU output models
  • Display and CO₂ status-indicator options
  • Field-exchangeable calibrated measurement modules
  • Traceable three-point CO₂ calibration certificate included
CO₂, Humidity and Temperature Transmitter GMW80 series

Vaisala GMW80 Series CO₂, Humidity and Temperature Transmitters

Vaisala GMW80 Series CO₂, Humidity and Temperature Transmitters

The Vaisala GMW80 Series provides dependable, cost-efficient room measurement for demand-controlled ventilation and indoor air-quality applications.

  • CO₂ measurement ranges up to 2000 or 5000 ppm, depending on model
  • Temperature measurement from 0 to +50 °C on selected models
  • Optional relative-humidity measurement from 0 to 95 %RH
  • Voltage, current, relay, Pt1000 and Modbus RTU options
  • Display or colour CO₂ indicator available on selected models
  • Stable Vaisala CARBOCAP® technology for continuously occupied buildings
  • Quick installation with correct CO₂ readings immediately after start-up
Incubator CO₂ Probe GMP231

Vaisala GMP231 CO₂ Probe for Incubators

Vaisala GMP231 CO₂ Probe for Incubators

The Vaisala GMP231 is an OEM carbon-dioxide probe designed for accurate measurement and permanent wall installation in life-science incubators.

  • CO₂ measurement range from 0 to 20%
  • Measurement performance optimized around 5% CO₂
  • Sensor head withstands heat sterilisation at +180 °C
  • At least 120 specified +180 °C sterilisation cycles
  • Internal temperature and pressure measurement for compensation
  • Heated sensor head helps prevent condensation
  • I²C, Vaisala RS-485 protocol and scalable 0–20 mA options
  • Four-point traceable CO₂ calibration certificate included
Vaisala Transmitter Indigo300

Vaisala Indigo300 Industrial Transmitter

The Vaisala Indigo300 is a rugged industrial transmitter for one Vaisala Indigo-compatible smart probe, providing local measurement display and up to three configurable analog outputs.

Its corrosion-resistant IP66 metal enclosure, flexible probe mounting and interchangeable probe design make Indigo300 suitable for humidity, temperature, dew point, CO2, moisture in oil and other demanding industrial measurements.

Vaisala CO₂ Probe GMP343

Vaisala GMP343 CO₂ Probe for Outdoor and Ecological Measurement

Vaisala GMP343 CO₂ Probe for Outdoor and Ecological Measurement

The Vaisala GMP343 is a rugged, high-accuracy carbon-dioxide probe for outdoor monitoring, ecological research, soil respiration, plant-growth chambers and demanding OEM applications.

  • Selectable CO₂ ranges from 0–1000 ppm to 0–2%
  • Diffusion-aspirated or flow-through sampling models
  • Accuracy up to ±(3 ppm + 1% of reading)
  • Temperature, pressure, humidity and oxygen compensation
  • RS-232, RS-485, 4–20 mA, 0–2.5 V or 0–5 V outputs
  • Raw and numerically filtered measurement data
  • IP67 probe housing with the cable connected
  • Compatible with MI70 for portable display and logging
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261

Vaisala MGP262 Biogas Methane and Carbon Dioxide Multigas Probe

Vaisala MGP262 Methane and Carbon Dioxide Multigas Probe

The Vaisala MGP262 continuously measures methane slip and carbon dioxide in offgas from biomethane-upgrading processes. Its in-situ design provides direct, always-on measurement without a separate sampling system.

  • Optimised for low-level methane measurement in CO2-rich offgas
  • CH4 measurement range from 0–5 vol-%
  • CO2 measurement range from 0–100 vol-%
  • Heated optical measurement for demanding and humid process conditions
  • Three isolated 4–20 mA outputs and RS-485 Modbus RTU
  • Ex-certified construction for direct installation in hazardous process areas

Ask Seacom about the MGP262

CO₂ Probe GMP252

Vaisala GMP252 PPM-Level CO₂ Probe

Vaisala GMP252 PPM-Level CO₂ Probe

The Vaisala GMP252 is an intelligent standalone probe for stable ppm-level carbon-dioxide measurement in demanding HVAC, refrigeration, agriculture and industrial applications.

  • CO₂ measurement range from 0 to 10,000 ppm
  • Measurement up to 30,000 ppm with reduced accuracy
  • Accuracy of ±40 ppm from 0 to 3000 ppm
  • Compensation for temperature, pressure, humidity and oxygen
  • Heated sensor head helps prevent condensation
  • 0–20 mA, 4–20 mA, 0–5 V, 0–10 V and RS-485 output options
  • Standalone Modbus RTU operation or connection to an Indigo transmitter
  • Compatible with Vaisala Indigo80 and Insight PC software
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261

Vaisala MGP261 Biogas Methane, Carbon Dioxide and Humidity Probe

Vaisala MGP261 Biogas Multigas Probe

The Vaisala MGP261 measures methane, carbon dioxide and humidity directly in raw biogas. Its in-situ design avoids a separate sampling system and helps operators monitor gas quality while protecting downstream equipment.

  • Measures CH4, CO2 and water vapour in one probe
  • 0–100 vol-% measurement range for methane and carbon dioxide
  • Humidity output as 0–25 vol-% H2O or −10 to +60 °C dew point
  • Heated optics help prevent condensation in wet biogas
  • Three isolated 4–20 mA outputs and RS-485 Modbus RTU
  • Ex-certified construction for direct installation in hazardous process areas

Ask Seacom about the MGP261

Vaisala Temperature and Humidity Logger VDL200

Vaisala VDL200 PoE Data Logger for viewLinc CMS

The Vaisala VDL200 is a secure Power-over-Ethernet data logger for monitoring temperature, relative humidity, carbon dioxide and analog or Boolean inputs in controlled and GxP-regulated environments.

Designed for the Vaisala viewLinc Continuous Monitoring System, the VDL200 combines interchangeable smart probes, onboard memory and battery backup to provide reliable, gap-free environmental monitoring.

Duct Mounted CO2 Transmitter GM20

Vaisala GMD20 Duct-Mounted CO₂ Transmitter – Discontinued

Vaisala GMD20 Duct-Mounted CO₂ Transmitter – Discontinued

The Vaisala GMD20 Series was designed for carbon-dioxide measurement inside ventilation ducts and demand-controlled ventilation systems.

  • Discontinued legacy product; not recommended for new projects
  • Nominal CO₂ measurement range from 0 to 2000 ppm
  • GMD20 without display and GMD20D with local display
  • 0–20 mA, 4–20 mA and 0–10 V analogue outputs
  • Optional relay or LonWorks® interface on applicable configurations
  • IP65 electronics enclosure for duct installations
  • Use Vaisala GMD110 for new installations
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