Hach-Lange POLYMETRON 9500 pH_ORP Sensors User Manual - Manual (Page 9)

Clean the sensor
W A R N I N G
Chemical hazard. Always wear personal safety protection in accordance with the Material Safety Data Sheet for
the chemical that is used.
W A R N I N G
Personal injury hazard. Removal of a sensor from a pressurized vessel can be dangerous. Reduce the process
pressure to below 10 psi before removal. If this is not possible, use extreme caution. Refer to the documentation
supplied with the mounting hardware for more information.
Pre-requisite: Prepare a mild soap solution with a non-abrasive dishwashing detergent that does not
contain lanolin. Lanolin leaves a film on the electrode surface that can degrade the sensor
performance.
Examine the sensor periodically for debris and deposits. Clean the sensor when there is a buildup of
deposits or when performance has degraded.
1. Use a clean, soft cloth to remove loose debris from the end of the sensor. Rinse the sensor with
clean, warm water.
2. Soak the sensor for 2 to 3 minutes in a soap solution.
3. Use a soft bristle brush to scrub the entire measuring end of the sensor.
4. If debris remains, soak the measuring end of the sensor in a dilute acid solution such as < 5%
HCl for a maximum of 5 minutes.
5. Rinse the sensor with water and then return to the soap solution for 2 to 3 minutes.
6. Rinse the sensor with clean water.
Always calibrate the sensor after maintenance procedures.
Replacement parts and accessories
Note: Product and Article numbers may vary for some selling regions. Contact the appropriate distributor or refer to
the company website for contact information.
Description Item no.
Combination pH sensor for hydrofluoric acid environments with integrated temperature
sensor.
08350=C=0003
Combination pH sensor for high temperatures with protected sensor, impedance
control and integrated temperature sensor.
08350=C=0004
Combination pH sensor for waste water environments incorporating a protected, flat
sensor, impedance control and integrated temperature sensor.
08350=C=0005
Combination ORP sensor for high temperatures 08351=C=0000
PVC DN 40 flow chamber, flange fitting 08350=A=9500
PP immersion shaft, clip fitting (0.5, 1, 1.5 meter) 08350=A=1105/1
PP immersion shaft, adjustable flange (0.5, 1, 1.5 meter) 08350=A=1005/1
PP immersion shaft, fixed flange (0.5, 1, 1.5 meter) 08350=A=6005/1
PP chemical cleaning kit (nozzle and feed pipes) 08350=A=7000
Liquid reservoir unit 08350=A=4000
Junction box 08350=A=8500
Pre-amplifier for 8350 probes 08350=A=8000
English 9