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- hm digital ap-1 hm digital aquapro handheld water total dissolved solids tester – ap-1
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HM Digital AquaPro TDS Water Quality Tester with Thermometer AP-1 Specs: TDS Range: 0-5000 ppm (mg/L). Temperature Range: 0-80 degrees C; 32-176 degrees F. Resolution: 1 ppm. Temperature Resolution: 0.1 degrees C/F. Accuracy: +/- 2%. Conversion Factor: NaCl (avg. 0.5). Calibration: Digital calibration by push button. Water resistant housing. Power Source: 1 x 3V button cell (included) (model CR2032). Dimensions: 5.9″ H x 1.1″ W x 0.5″ D. Weight: 1.5 Oz.