TDS meter MW401 Back Catalog number: MW401 Manufacturer: MILWAUKEE ELECTRONICS Availability: In the manufacturer's stock Price on request - + Recommended PH58 pH/ORP/Temp waterproof tester, -2.00 to 16.00 pH Price on request HI 98308 Water Purity Tester, 0.0 to 99.9mS/cm Price on request PH600 pH tester with 1 point calibration, ±0.2 pH accura Price on request