Single Channel: Temperature Recorder (TR-1050)

Model TR-1050
Submersible Temperature Recorder

The TR-1050 is a small (230mm x 38mm OD), self-contained, submersible temperature recorder with a calibration to ±0.002ºC.  Typical calibration drift of 0.002ºC per year has been measured. It can be deployed for a period of up to three years and can collect more than 2,400,000 samples. Data are retained in memory for 20 years (even without batteries).

The TR-1050 has a measurement range of -5ºC to +35ºC in its standard calibration. It can, however, be configured to measure wider ranges. The logger can be fitted with different thermistors to operate to as low as -40ºC or up to +50ºC  The TR-1050 may also be configured to measure a far higher range, if it is fitted with an external probe.  We have supplied an instruments to measure up to +300ºC. The logger temperature then simply needs to remain under +50ºC. 

Single Channel: Depth Recorder (DR-1050)

DR-1050
Depth Recorder

The DR-1050 is a small (38mm diameter, 220mm long), self-contained, submersible depth or pressure recorder. Pressure measurements are made to 24-bit resolution. The DR-1050 is calibrated to an accuracy of ±0.05 % full scale using NIST traceable standards.

Each unit employs an absolute pressure gauge, with ranges selectable from 10 dBars (10 metres of water) to 6.600 dBar making the unit suitable for a wide range of applications from borehole testing and groundwater monitoring to deep ocean. For groundwater measurement, a barometric reference may be used to record the atmospheric pressure over the local area. An optional underwater serial output permits triggering of sampling apparatus at preset depths.

Single Channel: Dissolved Oxygen (DO-1050)

DO-1050
Dissolved Oxygen Recorder

The DO-1050 is a small, self-contained, submersible dissolved oxygen recorder. The DO-1050 is calibrated to an accuracy of ±1% O₂ saturation, and can be easily recalibrated by the end-user. Each recorder employs an Oxyguard dissolved oxygen sensor (522M18), making it an ideal instrument for marine, freshwater, and aquaculture applications.

There are two external casings for the DO-1050: plastic and titanium. Both models are compact, measuring 230mm in length and have an outer diameter of 40mm. The plastic logger weighs 310g and the titanium 500g. The depth ratings for the different casings are: 740m (plastic); 2,000m (titanium; limited by dissolved oxygen sensor).  

Dual Channel: Temperature and Depth (TDR-2050)

Model TDR-2050
Submersible Temperature & Depth Recorder

The TDR-2050 is a small (235mm x 38mm OD), self-contained, submersible temperature and depth recorder . It can be deployed for a period of up to three years and can collect more than 1,200,000 sets of samples. Data can be retained in memory for 20 years (even without batteries).

• TDR-2050 clock accuracy of ±32 seconds per year.

• Three year deployment on one set of batteries

• 2,400,000 readings on one set of batteries

The TDR-2050 is available in two casings, plastic and titanium. The depth rating of the plastic case is 740m, the titanium 6,600m (limited by the pressure transducer). The temperature channel of the TDR-2050 is calibrated to an accuracy of ± 0.002°C (ITS-90) over the range -5 to +35°C.  Extended range calibrations are available. Typical drift has been measured to be 0.002°C/year. The thermistor may be external (<3sec time constant) or internal (<20sec time constant). A fast thermistor probe (0.095sec) is also available. The depth channel is calibrated to an accuracy of 0.05%fs  Ranges from 10m to 6,600m are available.

Dual Channel: Temperature and Dissolved Oxygen (TDO-2050)

Model TDO-2050
Submersible Temperature and Dissolved Oxygen Recorder

The TDO-2050 is a self-contained, submersible logger, designed to measure temperature and dissolved oxygen. It is very accurate and small (265mm x 38mm OD). The TDO-2050 can be mounted on the sea or harbour floor, fastened to an existing structure, attached to a mooring line, or used for profiling. It may also be used for freshwater and aquaculture applications.

The TDO-2050 is available in two casings, plastic and titanium. The depth rating of the plastic case is 740m, the titanium 2,000m (limited by the dissolved oxygen sensor). The temperature channel of the TDO-2050 is calibrated to an accuracy of ± 0.002°C (ITS-90). Based on long-term tests the drift has been measured at better than 0.002°C/year. The standard thermistor has a time constant of <3 seconds; a fast thermistor probe is also available (0.095 sec). The dissolved oxygen channel is calibrated to an accuracy of 1% O₂ Saturation. Calibration constants are stored in the logger and recalibration is easily carried out by the end-user.