TT-CL
2
Free Chlorine Sensor
1.1
SPECIFICATION
1.1.1
Sensor
Type
Membrane covered amperometric potentiostatic three-electrode system
Measurand
Free Residual Chlorine
Range
0-2, 0-5, 0-10mg/l (ppm)
Resolution
0.01mg/l (ppm)
Reproducibility
±5 %
Stability
-2 % per month (without calibration)
Working electrode
Cathode made of gold
Counter electrode
Anode made of stainless steel
Reference electrode
Silver / silver halide
Membrane material
Micro-porous hydrophilic membrane
Flow rate
0.5 l/min (0.13 gallon/minute [US])
Temperature range
>5 and <45°C
Temperature compensation
Automatically by an integrated thermistor (ATC)
pH-range
pH 4 up to pH 9.5
Permissible overpressure
0.5 bar
First-polarisation time
120 min
Re-polarisation time
30 min
Response time
T90: approx. 2 min
Zero-point adjustment
Not necessary
Zero running
Running at zero de-polarises the probe
Calibration
Manual using DPD or Automatic (Autocal)
Housing material
PVC, silicone, polycarbonate, stainless steel, perspex
Dimensions
Diameter approx. 25mm (1”), length 175mm (7”)
Maintenance intervals
Calibration
On control applications it is a week to a month & on non-control it is 1 to 3 months.
Electrolyte
Quarterly
Calibration reagent
Six monthly (Autocal unit only)
Membrane
Yearly
Interferences
High levels of other oxidants such as Ozone and Chlorine Dioxide
1.1.2
Flow cell
Inlet
¼” or 6mm barb fitting, or 8mm pipe push-fitting
Outlet
½” or 12mm barb fitting
No. of probes
Single and double flow cells available
Service isolation
Ball valve
Flow
0-1.4 l/min (preferred flow rate 0.5 l/min)
Inlet pressure
0.5 bar
Flow cell pressure
Effectively zero, cell open to atmosphere
Weight
1kg (single), 1.5kg (double)
Filter (if fitted)
100um
Flow switch
available as an option to give a low flow alarm if sample flow is lost.
1.1.3
Electrochemical probe simulator
Supplied with your instrument, if ordered. It simulates a constant output from a sensor and allows for easier
troubleshooting.
4
TURTLE TOUGH
