
I bought a cheaper Gain Express ORP meter and just attached the meter to a vertical bookshelf support with this solution in the end cap on the side of the cap tied my own. Keeps the sensor popping up all the time and works well.

Graduated Erlenmeyer Glass Flask Set With Narrow Mouth - 500Ml Capacity
15 Review

3Pcs 500Ml CVNDKN Wash Bottles W/ Scale -16 Oz: Plastic Safety Lab Squeeze Bottle
13 Review

Get Your All-Purpose Cleaning Solution With Bealee'S 24 Oz Plastic Spray Bottles - 2 Pack
16 Review

ULAB Scientific 1000Ml Borosilicate Glass Beaker With Printed Graduation - Durable And Accurate For Lab Use (UBG1005)
12 Review