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REED Instruments R3500-NIST pH Meter,$329.00
REED Instruments R3500-ELECTRODE pH Electrode$39.00
REED Instruments R3500 Digital pH Meter$49.98
REED Instruments R3500 pH Meter$109.00
REED Instruments R3500-KIT pH Meter and 4pH/7pH Buffer Solution Kit$139.00
REED INSTRUMENTS R3500-KIT / R3500KIT (BRAND NEW)$131.00
REED Instruments R3500 pH Meter$79.99
REED INSTRUMENTS Pocket pH Tester: 0 pH to 14 pH, +/-0.02 pH, 0.01 pH pH$62.00As an eBay Partner, userbars.org may earn a commission from qualifying purchases.