Ammonia filling solution, (4) 30ml.

Carbon dioxide filling solution, (4) 30ml.

Electrolyte solution 3.5M KCl + AgCl = 4 x 30ml bottles 1 x 500ml bottles.

Electrolyte solution 0.5M (4 x 30ml).

Electrolyte solution 4 x 30ml 1M KN03.

Electrolyte solution 1 M NaCI, 500ml.

Electrolyte solution 3.5M KCL 4 x 30ml.

To minimize clogging and ensure fast response time, always keep the glass bulb and the junction of your pH electrode moist.

The HI 7041 electrolyte solution is suited to maintain Polargraphic D.O probes and is ready to use in 500mL and 30mL bottles.

HI 7042S is a bottle of replacement electrolyte solution for galvanic type dissolved oxygen probes.