Esonet Yellow Pages

The TR-1050 is a small, self-contained, submersible temperature recorder. TR-1050s are calibrated to an accuracy of ± 0.002 °C (ITS-90 and NIST traceable standards). Drift has been measured at better than 0.002 °C/year, and extended temperature ranges are available for temperatures from -40 to +50 °C. Special probes have been supplied to measure up to +300 °C. The thermistors used in the TR-1050 are stable and aged, and are available in three housings. The standard model has a time constant of less than 3 seconds. The optional fast thermistor model has a time constant of less than 0.095 seconds. The third model comes standard in the titanium TR-1050, which has its thermistor embedded in the head of the logger; it has a time constant of less than 20 seconds. 8 MB of Flash memory provides sufficient storage for 2,400,000 samples, which can be taken by a single set of batteries. The two high-powered 3 V lithium cell batteries (CR123A) are standard camera batteries available world-wide, and provide sufficient power for deployments of more than 3 years. There are two casings for the TR-1050: plastic; and titanium. Both models are compact, measuring 230 mm in length and have an outer diameter of 38 mm. The plastic logger weighs 310 g and the titanium 500 g. The depth ratings for the different casings are: 740 m (plastic); 10,500 m (titanium).