ORP/Redox-500mL 240mV Hardness Tester The ToxiRAE Pro LEL is

The ToxiRAE Pro LEL is the world's first wireless personal combustible gas monitor

The PVC Double Valve Pump operates up to 100 ft

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

Each crawler ships with one set of small wheels

HI 991300 measures low range conductivity and TDS

ORP/Redox-500mL 240mV Hardness Tester The ToxiRAE Pro LEL isHI7021L 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.