This specification is for both The D-Opto Logger and D-Opto Sensor. For more detailed information on the individual units, please use the links alongside.

Dissolved Oxygen

Accuracy 1% of reading or 0.02ppm , whichever is greater
Resolution 0.01% Saturation, 0.001ppm
Range 0.00 to 25.00 ppm
Repeatability 0.01ppm
Response time 90% in less than 60 seconds
Temperature compensated 0 to 50 Deg c
Sensor drift Less than 1% per year

Temperature

Accuracy +/- 0.1 Deg C
Resolution 0.01 Deg C
Range 0 to 50 Deg C

Physical Specifications

Probe dimensions 48mm (1.89”) diameter, 156mm (6.173”) long
Logger dimensions 48mm (1.89”) diameter, 220mm (8.66”) long
Probe construction Acetyl, stainless steel, cast epoxy
Ambient conditions -40 to 55 Deg C, 0 to 100% humidity, 0 to 10,000 feet
Pressure rating 30 psi
Cable (sensor only) 4 core, 20AWG, fully screened, EPDM sheath

Electrical Specifications

Power requirement

Sensor : 8-15 V DC, 0.2 mA standby, 12mA during sampling
Logger: 1 x 9 volt alkaline battery (PP9)
Protection Reverse polarity, fully surge protected

Communications Protocols

SDI-12 as standard and various digital or analogue output options. User set address (0-9,A-Z). Maximum transmission distance; 350 meters (to confirm) RS232 communications between PC and interface board.

Why SDI-12 communications? Click here for more information

4-20mA Analog Output D-Opto

D-Opto 4-20mA Default Output


 4mA 20mA
Temperature 0°C 60°C
Dissolved Oxygen % Saturation 0% 250%
Dissolved Oxygen Content (ppm) 0 25 ppm

D-Opto scaling can be changed, to improve the resolution across the expected operating range.

Optional configurations

  • User select cable length
  • D-Opto logger, fully self contained with on-board battery pack
  • Standard pipe thread mounting clamp
  • DO-Cal Kit; mobile field DO calibration kit
  • Optical isolation interface

Note: Specification subject to change without notice