eosFD | Forced Diffusion Soil CO₂ Flux Sensor

The eosFD CO2 flux sensors are built on Eosense’s patented Forced Diffusion (FD) technology. They enable high-resolution flux measurements without the need for moving parts, making them uniquely suited for low-power and long-term deployments in challenging field environments.

• Scalable CO2 flux measurements

• Field-ready, durable design

• Flexible data logging options

• Low power and lightweight

  
  

Potential Applications

• Field-based control-treatment experiments (e.g. soil amendments)

• Remote ecosystem monitoring

• Carbon flux studies in forest, grassland, and agricultural environments

Scalable CO2 Flux Measurements

The eosFD sensors use a modular node-based system that can be scaled to cover larger spatial areas with fewer instruments. Each eosFD system includes two types of sensors:

1. Soil Nodes that measure CO2 being emitted from the soil surface

2. Reference Nodes that capture the near soil surface atmospheric concentrations

These nodes can be paired in a 1:1 configuration for more precise and localized flux measurements, or a single Reference Node can be shared across multiple Soil Nodes to reduce costs and extend spatial coverage across a larger field site.

Field Ready, Durable Design 

The eosFD features a completely solid-state design with no pumps or other moving parts thereby minimizing mechanical failure points and maximizing long-term reliability. Its integrated CO2 sensor offers high accuracy and resolution concentration measurements and long operational life. Built with weatherproof materials and tested in harsh field conditions, the eosFD is designed for extended unattended operation.

Flexible Data Logging Options

The eosFD sensors are compatible with modern Campbell Scientific dataloggers via Modbus RS-485 protocols, enabling integration into existing site infrastructure. This is especially valuable for users who need to synchronize soil gas flux data with other meteorological or environmental sensors.

For standalone deployments or remote sites, eosFDs can also log data internally. Internal logging provides a simple way to capture flux data without requiring external hardware, making it ideal for remote locations without existing datalogging infrastructure.