Product Description
The Vaisala GMP343 is a precise and robust CO₂ probe designed for environmental and industrial measurement applications. Typical use cases include soil respiration studies, ambient CO₂ monitoring, plant growth chambers, and OEM applications.
The probe operates using a single-beam CO₂ measurement with dual wavelengths, which requires no moving parts, ensuring low maintenance and long-term durability.
The GMP343 can output both numerically filtered and raw measurement data and allows for accurate compensationusing internal temperature measurement as well as user-defined values for humidity, pressure, and oxygen.
When combined with the Vaisala GM70, the probe becomes a powerful tool for accurate in-situ measurements. The GM70 serves as a display, communication, and data logging device.
Each probe is calibrated using high-precision calibration gases at multiple concentration points (from 0 ppm up to 2% CO₂). Calibration is also performed at different temperatures (−30 °C to +50 °C) to ensure maximum accuracy under real-world conditions.
If needed, the device can be recalibrated using the multi-point calibration (MPC) feature, which supports up to 8 user-defined calibration points.
Technical Specification
The probe is based on Vaisala CARBOCAP® sensor technology, a silicon-based non-dispersive infrared (NDIR) sensor, ensuring high accuracy and long-term stability.
It offers a measurement accuracy of ±0.5%, supported by multi-point calibration across various CO₂ concentrations and temperatures.
The single-beam dual-wavelength measurement method provides stable and drift-resistant performance without the need for moving components.
The device includes advanced compensation options for temperature, pressure, humidity, and oxygen, ensuring reliable measurements under varying environmental conditions.
With a wide operating range for temperature and humidity, the probe is suitable for demanding and harsh environments.
Additionally, both diffusion and flow-through models are available, allowing for flexible adaptation to different applications.
