{"id":10059,"date":"2026-04-02T09:27:50","date_gmt":"2026-04-02T09:27:50","guid":{"rendered":"https:\/\/eko-instruments.com\/us\/?post_type=product&p=10059"},"modified":"2026-05-07T12:42:18","modified_gmt":"2026-05-07T12:42:18","slug":"eko-hf-01sg","status":"publish","type":"product","link":"https:\/\/eko-instruments.com\/us\/product\/eko-hf-01sg\/","title":{"rendered":"HF-01SG Heat Flux Soil and Ground"},"content":{"rendered":"

Meet the HF-01SG Soil and Ground Heat Flux Sensor<\/h2>\n

Meet the robust, precision-engineered HF-01SG Soil and Ground Heat Flux Sensor. As the sister of the HF-01S, this sensor helps you carry out soil and ground heat flux measurements with ease and accuracy under real-world conditions. EKO brings over 50 years of heat flux sensor manufacturing experience to this design. We developed the HF-01SG to meet the demanding requirements of environmental research, geotechnical analysis, and surface energy balance studies.<\/p>\n

The rugged, sensitive, fast-response, weather-proof sensor allows you to measure soil and ground heat flux as precisely as possible. Its minimal form factor and thin body minimize the sensor’s disturbance on the actual heat flow. This design makes installation easy without disturbing the soil environment. The limited surface area also minimizes the chance of water blockage during soil irrigation. We manufacture every sensor carefully in Japan and pass it through critical quality tests to ensure it lasts.<\/p>\n

Why Choose the HF-01SG?<\/h3>\n

Just like the HF-01S<\/a>, the HF-01SG follows the ISO 9869 standard. It benefits from a unique combination of size and sensitivity. Despite the inverse correlation between these two characteristics, the HF-01SG offers the best of both: small size and high sensitivity.<\/p>\n

When installing the sensor, you can witness the importance of the thin and compact body as you easily push it through the soil. Our location tag, for the first time, allows you to know where your sensors are buried. This ensures the protection of cables and sensors against unintentional damage during uninstallation.<\/p>\n

Its low thermal resistance ensures minimal disturbance to the natural heat flow in soil. Additionally, its rugged enclosure guarantees stability in varying weather and environmental conditions. When you install this sensor according to best practices, it becomes a key component in evaluating thermal conductivity, ground heat capacity, and overall energy exchange at the surface level.<\/p>\n

Applications<\/h3>\n

Thanks to the specifications, flat construction, and water-resistant design, you can bury it at specific soil depths. You can also place it directly on surface layers for monitoring diurnal heat cycles, solar absorption, and insulation behavior of ground coverings. The plate is suitable for integration into energy balance models and thermal conductivity assessments. It also works well alongside building performance assessments.<\/p>\n

Designed to withstand harsh soil and ground environments, the HF-01SG supports a wide range of scientific and practical applications including:<\/p>\n