This new concept allows access to the data port, as well as to the battery carousel, without exposing the electronics. Multiple sensors are housed at the end of the logger. Both ends of the XR-420s utilises our integral pressure release for safe opening. The XR-420 s casing can be ordered in titanium to permit operation to 8,500 metres. Measurements are made to 24-bit resolution to give precise data recording.
Flash memory is used to ensure data retention even when the batteries run out.
2Mb of memory provides sufficient memory for 600,000 readings. With the titanium casing maximum operating depth is 8,500m. The Model XR-420 CT is designed to monitor the conductivity and temperature profile of the water with a high degree of precision. The XR-420 CTD is an autonomous data logger designed to monitor conductivity, temperature and pressure. The two central electrodes are high impedance and designed to monitor the AC voltage between them, which is generated by current injected into two further electrodes.