Water Quality Analyser Sensor Specifications  
 
Sensor Range Accuracy Resolution Type T-611 T-612 T-613 T-617
Temperature -2 to 50ºC ±0.05ºC 0.01ºC pt100 element in a stainless steel sleeve. x x x x
Conductivity 0 to 80 ms/cm
0 to 8000 us/cm
±0.05 ms/cm
±5 us/cm
0.02 ms/cm
3 us/cm
Four platinum electrode cell. Low range uses KCl algorithms, high range uses standard seawater 1 algorithms x x x x
Salinity 1 0 to 60 ppt ±0.05 ppt 0.02 ppt Calculated from conductivity and temperature. x x x x
Dissolved Oxygen 0 to 200% saturation
0 to 20 mg/l
±0.5% 0.1% Active Pb/Ag cell with a stabilised PTFE membrane, inbuilt stirrer to allow constant flow over membrane for stable reading. x x x  
Turbidity 0 to 600 ntu ±0.5 up to 300
±5% from  300
0.2 ntu
0.3 ntu
Nephelometric measurement from a detector aligned 90º to the pulsed infra-red source that is unaffected by daylight. x x x  
pH 0 to 14 ±0.03 0.01 Combination Ag/AgCl with junction (common with ORP). x x x OPT
ORP 2
(REDOX)
-700 mV  to
+1100 mV
±3 mV 1 mV Combination bare metal electrode with common reference junction with pH sensor. x x x  
Depth 0 to 100 m or
0 to 150 m
±0.1%
of full scale
0.1 m Dual active arm silicon strain gauge. Optional atmospheric pressure compensation. OPT x OPT x
Storage capacity for programmed logging – number of scans 3 2135 16300   3171
Storage capacity for operator STORE button – number of scans 3 600     890
Data Tag – available for operator to insert when using STORE button       50
OPT - Optional
1  –         Calculated from conductivity and temperature using the Practical Salinity Scale
2  –         REDOX output is referenced to hydrogen ion electrode as per IEC746-5.
3  –         Each scan includes a reading of each sensor plus date/time