1. Product Overview
The BT8008 series is a high-precision, ceramic capacitive immersion-type intelligent water level and temperature gauge engineered for long-term monitoring of groundwater and surface water. Powered by a dry ceramic capacitive sensing element, the BT8008 delivers exceptional long-term stability, strong overload capabilities (5× F.S.), and outstanding corrosion resistance.
Utilizing advanced mixed-signal processing technology, the gauge offers full-scale digital linear calibration and digital temperature compensation across the entire temperature spectrum. Equipped with power supply monitoring and a built-in watchdog timer, it prevents system crashes and guarantees uninterrupted operation in remote hydrology and environmental monitoring installations.
Key Features & Advantages:
Dry Ceramic Capacitive Sensor: Superior long-term drift (<0.05% F.S./year) and high overload protection (500% F.S.).
Ultra-High Accuracy: Level measurement accuracy up to ±0.05% F.S. with temperature accuracy of ±0.2 °C (0~70 °C).
Dual Parameter Monitoring: Simultaneous real-time measurement of water level and water temperature.
Smart & Secure Signal Processing: Digital calibration parameters stored in non-volatile memory with reverse polarity and overvoltage protection.
Industrial Communication: RS485 interface with standard MODBUS-RTU protocol, supporting up to 128 nodes (optional 4–20mA output).
Rugged IP68 Construction: Fully sealed 316L stainless steel (or optional titanium alloy) housing for harsh aquatic environments.
2. Overall Dimensions(cm)
3. Applications
- Groundwater Monitoring: Deep-well water levels and continuous thermal monitoring.
- Surface Water Hydrology: Rivers, lakes, reservoirs, and open channel flow telemetry.
- Environmental & Industrial: Environmental monitoring stations and process automation via DCS/PLC networks.
4. Technical Parameters
| Main Specification | |
| Accuracy | ±0.25% F·S(0～2 m H2O) ;
±0.05% F·S(0～10 m H2O) |
| Range | 0～0.5 mH2O… 10mH2O |
| Long-term stability | ＜0.05% F·S/year |
| Overload capability | 5X F·S |
| Temp. Accuracy | ± 0.2 ℃（0～70 ℃） |
| Temp. Resolution | 0.05℃ |
| Temperature Characteristics | |
| Compensation Temp. | 0～70℃ |
| Operating Temp. | -10～80℃ |
| Drift of Temp. | Zero： <0.005%F.S/℃ |
| F.S：<0.005%F.S/℃ | |
| Storage Temp. | -40～125℃ |
| Electrical Characteristics | |
| Power Supply | DC9～30V （typ.24V） |
| Power Protection | Anti-reverse connection over voltage protection |
| Output method | RS485/MODBUS-RTU protocol ：128 nodes or 4～20mA |
| Structural Characteristics | |
| Sensor Material | Alumina ceramic, gold plating |
| Housing Material | Stainless steel316L or titanium alloy |
| Cable Material | Polyurethane or PVC optional |
| Cable Specifications | Φ7.6m, with shielding layer and guide hole length customized |
| Environmental Characteristics | |
| Protection Level | IP68 |
| Insulation | 100MΩ@50V |
5. Selection Guide
