Hanna Instruments HI 2214 - Manual (Page 43)

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HI 1330B
Glass-body, semimicro, single junction, refillable, combination
pH electrode.
Use: laboratory, vials.
HI 1331B
Glass-body, semimicro, single junction, refillable, combination
pH electrode.
Use: flasks.
HI 1230B
Plastic-body (
PES), double junction, gel-filled, combination pH electrode.
Use: general, field.
HI 2031B
Glass-body, semimicro, conic, refillable, combination
pH electrode.
Use: semisolid products.
HI 1332B
Plastic-body (
PES), double junction, refillable, combination pH electrode.
Use: general purpose.