CO2 Meter Handheld (0-100%)

Model: FD-90A-CO2-100%
User Manual: Click Here
Blog Article: Click Here


  • ⚛️ DETECT: Single-gas detector for carbon dioxide, 0 - 100% with 0.1% resolution. Comes FACTORY-CALIBRATED.
  • 🔋ACCURACY: Dual Beam NDIR sensor with accuracy: ≤ 5% F.S. and response time: T < 30 sec. Zero and span calibration options.
  • 🎆 ALARMS: Adjustable audio, visual, and vibration alarms alert when preset levels are reached.
  • 💪 STRONG: Shockproof, water-resistant, dust-proof, and explosion-proof.
  • 🕵️ TRUSTWORTHY: 1-year limited warranty. Product tested and verified in the USA.

Technical Specifications

Carbon dioxide (CO2) detection: 0 - 100% with 0.1% resolution
Accuracy: ≤ ± 5% F.S
Response time: T < 30 sec
Indication: LCD indicates the time, concentration, temp, and battery state
Alarm: Indication of alarm, fault, and low voltage with LED, sound, vibration
Operating temperature: 0F - 122F
Humidity: < 95% RH non-condensing
Operating voltage: DC 3.7V Li-battery, 1500 mAh
Working time: > 24 hours
Charging time: 4 hours
Sensor life: up to 7 years
Protection category: IP65
Weight: about 130g (including battery)
Calibration: USA NIST Traceable Gas Source

Video Tutorial

In the Box?

  • CO2 Meter
  • English user manual
  • USB Charging Cable
  • Belt Clip and Sling
  • Calibration Cap Cover
  • USA NIST Calibration Certificate
  • USA Technical Support
carbon dioxide CO2 package ppm levels in air
APPLICATIONS - CO2 for Agriculture and Silos
- CO2 for Research and Development Exposure
- CO2 for Process Inspection
- CO2 Manufacturing and Assessment
- CO2 for Experiments

CO2 Meter Full Range (0-100%)

This is our professional carbon dioxide (CO2) meter that stands out as the top-tier choice and offering a cutting-dual channel NDIR CO2 sensor. Designed to cater to the needs of professional industrial technicians who require CO2 detection capabilities beyond basic ambient readings and require the full volumetric detection 0-100% range of monitoring. It is an ideal solution for CO2 measurements in silos, tanks, storage rooms, fermentation processes, beer production, and various industrial processes. For those interested in a narrower range, we have the same model in 0-10% CO2 and 0-5000ppm CO2.

CO2 Meter Carbon Dioxide

Note: The FD-90A-CO2 is a diffusive gas meter model, which means it does not have a built-in pump. If you want a forced air pump feature, you can purchase a separate pump option, or purchase the built-in pump CO2 0-100% version.

CO2 Meter (0-100%) Comparison Chart

Carbon Dioxide 0-100% Comparison Chart to Other Models.

What is a CO2 Meter?

A CO2 Meter is a small handheld unit that is able to detect the CO2 molecules in the air and measure their concentration relative to the volume of other gases. A CO2 meter usually costs between $300 to $2000.

A CO2 meter gauges the carbon dioxide levels indoors, in a silo, incubator, closed space, or any environment one decides to place the meter. A CO2 meter incorporates a Non Dispersive Infra Red sensor which selectively tracks the CO2 concentration via gas absorption. These sensors employ and IR lamp source and a thermopile with a carefully tuned thin film bandpass IR filter.

Handheld CO2 Meter used to detect CO2 in air and incorporating a NDIR sensor.
Handheld CO2 Meter used to detect CO2 in air and incorporating a NDIR sensor.

Case Study 1:
CO2 Levels in Insect Control for Grain Storage

An interesting study looks at employing CO2 derived from biogas to control pest infestation in wheat grain storage.

Controlling pests in wheat storage is paramount. Post-harvest losses occur in harvesting, threshing, cleaning, storage, processing, and transportation. Insect infestation can damage food quality, affect human health, and create a breeding ground for microorganisms. Phosphine gas is currently widely used, but pest resistance is increasing due to poor sealing and inefficient use. Carbon dioxide (CO2) as a controlled atmosphere offers a potential alternative to traditional fumigants for pest control.

Employing CO2 gas for insect control in wheat grain storage.
Employing CO2 gas for insect control in wheat grain storage.

This study looked at the efficacy of used CO2 as as pest control during wheat storage. The study assessed bio-CO2 (≥98% CO2, ≤2% CH4) from a CBG plant as CO2 source for wheat storage. The study compared bio-CO2 and pure CO2 effects on Rhyzopertha dominica mortality, seed germination, and wheat quality.

It was found that bio-CO2 achieved 100% insect mortality in 1-5 days and pure CO2 in 4-8 days. The R. dominica population multiplied 3.9x in two months and 10.4x in six months in control grains.

CONCLUSION (CASE STUDY CO2 LEVELS FOR PEST CONTROL IN WHEAT STORAGE) Utilizing bio-CO2 (≥98.0% CO2, ≤2.0% CH4) from a compressed biogas plant demonstrated superior insect mortality efficacy compared to pure CO2. The presence of CH4 and H2S in bio-CO2 potentially contributed to added insect lethality. Optimal purging efficiency was achieved at a 1.5 L/min flow rate. Across 80%, 60%, and 40% CO2 concentrations, both bio-CO2 and pure CO2 maintained insignificant (p > 0.05) seed weight loss during two and six months of controlled atmosphere storage.
Handheld CO2 Meter
Handheld CO2 Meter detecting Carbon Dioxide Gas.
FUN FACT! CO2 gas is what gives soda its delightful fizziness! When under pressure, CO2 dissolves in liquid, and when you open a carbonated drink, the sudden drop in pressure causes the dissolved CO2 to escape from the liquid in the form of bubbles, creating the characteristic effervescence and refreshing taste.

What is the recommended frequency for calibrating my handheld CO2 monitor?

Our suggestion is to perform calibration every 6 to 12 months. The frequency of calibration directly influences the precision of your CO2 meter's readings. You have the option to utilize our CO2 gas calibration service or conduct self-calibration using a kit containing the following components:

Calibration Kit
Calibration Gas (CO2)
Calibration Gas Regulator (C10)

Best CO2 Detectors

How long will the CO2 Monitor Last?

The advantage lies in the impressive longevity of CO2 monitors when compared to other gas sensors like electrochemical cells. CO2 monitors employ NDIR (Non-Dispersive Infrared) sensors, durable electronic components that generally remain operational for 5 to 15 years. Among these components, the infrared source tends to experience gradual degradation over time. Thus, an annual calibration is recommended to maintain precise and dependable performance.


  • A CO2 meter measures CO2 concentration to help with insect control for grain.
  • A CO2 meter is also known as a carbon dioxide monitor, analyzer, detector, or CO2 analyzer.
  • CO2 meters are widely used in diverse labs, including government, private, and academic settings.
  • Remember to calibrate your incubator's CO2 meter for precise results.


This article was written by me, Dr. Koz (no ghostwriters and no AI content here!). I am the President of Forensics Detectors (CA, USA). I am also a subject matter expert on gas sensor technology, gas detectors, gas meters, and gas analyzers. I have been designing, building, manufacturing, and testing toxic gas detection systems for over 20 years.... and still love it.

Email:  drkoz@carbondioxidedetector.com

dr Koz
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