Hanna Instruments HI 2550 - Manual (Page 58)

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HI 70442M* 1500 ppm (mg/L), 250 mL
HI 70442L* 1500 ppm (mg/L), 500 mL
* 1500 ppm TDS have an approximate conversion factor of:
0.65 ppm = 1 μ S/cm conversion rate.
pH ELECTRODES
All electrodes part numbers ending in B are supplied with a BNC connector
and 1 m (3.3') cable, as shown below :
HI 1043B
Glass-body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.
HI 1053B
Glass-body, triple ceramic, conic shape, refillable, combination pH electrode.
Use: emulsions.
HI 1083B
Glass-body, micro, Viscolene, non-refillable, combination pH electrode.
Use: biotechnology, micro titration.
HI 1131B
Glass-body, single junction, refillable, combination pH electrode.
Use: general purpose.