Calibration Solutions/pH Up and Down Thermometer/Humidity Gauges Hanna Combo Meter $199.95 Hanna GroCheck Combo Meter $229.95 Light Meter $29.99 Sun Analyzer Light Meter $14.99 Rapitest Soil Meter $24.99 Assorted Digital and Mechanical Timers Hanna pH Tester $54.95 Milwaukee Smart Cal-Test TDS Meter $99.95 Milwaukee Smart Cat-Test pH Meter $99.95 Sunleaves TDS/PPM Digital Tester $39.95 Rapitest Soil Test Kit $16.95 Sunleaves Pen Batteries $5.95 Sunleaves PH Test Kit $7.95 In-Line TDS Meter $39.95 Trimeter $259.95