Hanna Instruments HI 121 - Manual (Page 57)

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ORP PRETREATMENT SOLUTIONS
HI 7091L Reducing Pretreatment Solution, 500 mL bottle
HI 7092L Oxidizing Pretreatment Solution, 500 mL bottle
pH ELECTRODES
All electrodes with code ending with P are supplied with BNC & pin
connectors and 1 m (3.3') cable, as shown below:
HI 1043P
Glass-body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.
HI 1053P
Glass-body, triple ceramic, conic shape, refillable, combination pH electrode.
Use: emulsions.
HI 1131P
Glass-body, single junction, refillable, combination pH electrode.
Use: general purpose.
HI 1083P
Glass-body, micro, Viscolene, non-refillable, combination pH electrode.
Use: biotechnology, micro titration.