ORP/Redox-500mL 240mV Hardness Tester Each crawler ships with one

Each crawler ships with one set of small wheels

The crawlers can operate fully submersed and are water resistant to depths of up to 100m (330')

strong polyurethane wheels

Very easy to use - even by non-technical personnel

Pairing the ProQuatro with the 4-port cable creates an extremely powerful handheld multiparameter water quality instrument

ORP/Redox-500mL 240mV Hardness Tester Each crawler ships with oneHI7021L is a quality ORP test solution made from reagent grade chemicals and used to test platinum and gold ORP electrodes. Hanna test solutions have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution.