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Hand-held carbon dioxide meter with triple-line LCD display

Amprobe

Amprobe CO2-100 Carbon Dioxide Meter 9999 ppm

SKU CH-DP4S-5EVZK

Measures CO₂ up to 9999 ppm with temperature, humidity, dew point and wet-bulb readings on a triple-line LCD

  • Product typeEnvironmental & Mechanical
  • Measures CO₂ up to 9999 ppm for comprehensive air-quality checks
  • Reads temperature from 14 °F to 140 °F across diverse environments
  • Tracks humidity 0 to 95 % with ±3 % accuracy at 25 °C
  • Calculates dew point down to -4 °F and wet-bulb up to 139.8 °F
  • Triple-line LCD with data hold, storage and auto power-off for efficient logging

What the meter measures

The Amprobe CO2-100 is a hand-held carbon dioxide meter designed for indoor air quality checks in offices, schools and commercial buildings. It reads CO2 concentration from 0 to 9999 ppm, temperature from 14 to 140 degrees F and relative humidity from 0 to 95 percent. Facility managers and HVAC technicians use it to verify ventilation performance quickly.

Accuracy that decides fit

CO2 accuracy is stated as +/-30 ppm plus or minus 5 percent of the reading, while humidity accuracy is +/-3 percent at 25 degrees C between 10 and 90 percent RH and +/-5 percent outside that range. If your protocol demands tighter tolerances than these figures, this model will not meet the requirement.

Straightforward operation with common pitfalls

The triple-line LCD shows CO2, temperature and humidity simultaneously, and auto power-off preserves battery life. A low-battery indicator warns before the cell dies. The main installation issue is forgetting to let the sensor stabilise in fresh air before logging data; skipping that step produces readings that drift for several minutes.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $436.99
Pricier than about 90% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameAMPROBE
Product typeEnvironmental & Mechanical

Questions about this item

What does the 9999 ppm upper limit mean for day-to-day air-quality checks?

The meter reads carbon-dioxide concentrations from 0 to 9999 ppm, so it covers typical indoor levels and will flag heavily occupied or poorly ventilated spaces before the display maxes out.

How does the ±30 ppm ±5 % accuracy spec affect the readings I see on the triple-line LCD?

At any displayed value the true concentration is within 30 ppm plus or minus five percent of that reading, giving reliable trend data for ventilation decisions.

What are the physical requirements to mount or carry this hand-held meter on site?

The unit is a self-contained hand-held instrument with a built-in display and auto power-off, so it operates without external mounts, cables or special fixtures.

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