The T2CL, manufactured by Instrumentation Northwest, is no longer available. It was a two-parameter water quality sensor. The first parameter provided a temperature measurement and had a range of 0° to +50°C. The second parameter was the chloride measurement. This sensor offered increased stability due to a patented reference electrode technology. The chloride sensor used ring electrodes.
The "-L" on a product model indicates that the cable length is specified at the time of order.