Van Essen Instruments TD-Diver Data Logger

TD-Diver, the industry-standard water level datalogger. The TD-Diver is a submersible datalogger for long-term uninterrupted, real-time water level monitoring using a pressure sensor when submerged at a fixed level under the water surface. The pressure sensor measures the equivalent hydrostatic pressure of the water above the sensor diaphragm to calculate the total water depth. The Diver autonomously measures pressure and temperature and records them in its internal memory. The Diver is ideal for ground and surface water level applications. The TD-Diver features: Designed for up to 10 years of use. Solid enclosure to make borehole deployments easier. Spend less time in the field with fast download speeds. Large memory enable susers to take a sample every 15 minutes for 2 years. Enhanced data integrity with the new backup memory feature. Compatible with all of your existing Diver accessories. This Diver features a stainless steel (316 L) casing with a 22 mm diameter. The TD-Diver can store a maximum of 72,000 measurements (date/time, pressure, and temperature) in its working memory and 72,000 measurements in its backup memory. The TD-Diver samples pressure and temperature at fixed length intervals and stores these values in fixed length or continuous memory. The TD-Diver is available in the following pressure ranges: 10 m, 20 m, 50 m, and 100 m. Features and Benefits Click here to learn more about the product. Features Compact size: Ø 22 mm – length 110 mm Memory: 72,000 records of time stamp, pressure and temperature with backup Continuous and fixed length memory Benefits Easy installation in almost every well Cost effective frequent, long-term measuring Reliable and accurate data Low maintenance, no user calibration Applications Click here to view product applications. Long-term water level monitoringGroundwater monitoring projectsGroundwater monitoring network automationWatershed, drainage basin and recharge areasStream gauging, lake levels and reservoirsWetlands and storm water run-off monitoring Key Specifications Click here to view product specifications. General Length 110 mm Diameter 22 mm Memory 72,000 measurements with backup Weight 104 grams Housing stainless steel 316L Battery life up to 10 years (dependent on usage) Sample interval ½ second to 99 hours Sample methods Fixed interval Pressure Part No. DI801 DI802 DI805 DI810 Unit Range 10 20 50 100 meter Accuracy* ±0.5 ±1.0 ±2.5 ±5.0 cmH2O Resolution 0.2 0.4 1.0 2.0 cmH2O Temperature Value Unit Range -20 .. +80 °C Accuracy* ±0.1 °C Resolution 0.01 °C *typical, see product manual for full technical specification