ST4 Soil temperature probe with 10m cable

Reliable Soil Temperature Data for Critical Research and Agriculture

The ST4 Soil Temperature Probe is engineered for professionals who require dependable and accurate subsurface temperature data. Its IP67 rating ensures complete protection against dust and water ingress, guaranteeing long-term performance even in saturated or challenging soil conditions. The 10kΩ thermistor provides a stable and precise response, crucial for studies on seed germination, root zone activity, nutrient uptake, and ecosystem energy fluxes. The extended 10-meter cable offers significant installation flexibility, enabling connection to data loggers placed at a considerable distance from the measurement site without the need for additional splicing or extensions.

Built for Long-Term Deployment and Easy Integration

Constructed with a durable stainless steel sheath, the ST4-10 is built to withstand corrosion and physical stress, ensuring data integrity over many seasons. The probe's 6-second response time quickly captures temperature changes, providing a dynamic view of soil thermal properties. This sensor is designed for seamless integration with Delta-T's range of data loggers, including the GP2 and GP1, allowing it to become a core component of comprehensive environmental monitoring systems focused on meteorology, hydrology, and precision agriculture.

Key Advantages of the ST4-10 Probe

• High Accuracy & Robust Design: Delivers ±0.2°C accuracy with a robust stainless steel sheath and IP67 rating for ultimate reliability in harsh, wet environments.
• Extended Reach: The 10-meter-long PVC cable provides exceptional flexibility for installation in large fields or remote locations, far from the data logger.
• Easy Integration: Simple 2-wire connection and compatibility with popular Delta-T data loggers (GP2, GP1) make setup straightforward and quick.
• Low Maintenance: The solid-state thermistor technology and rugged construction ensure a long operational life with minimal maintenance required.
• Focused Measurement Range: Optimized for the most critical biological and environmental temperature range (-10°C to +40°C).

Optimal Application and Use

For accurate readings, install the probe at the desired depth within the root zone or soil horizon under study. Ensure the stainless steel sheath is in full contact with the soil without any air gaps. When deploying the 10-meter cable, carefully route it to avoid sharp bends, potential damage from machinery, or trip hazards. The cable is rated for temperatures from -10°C to +40°C; avoid exposing it to conditions outside this range. Connect the two wires to the appropriate terminals on your compatible Delta-T data logger and configure the channel for a 10kΩ thermistor input.