![HM Digital HM Digital](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-25.gif) | ![HM Digital ZT-2 PPM Tester HM Digital ZT-2 PPM Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-zt-2-ppm-tester-61.gif) List: $16.95 Sale: $9.99 | ![HM Digital TDS-EZ TDS Tester HM Digital TDS-EZ TDS Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-tds-ez-tds-tester-64.gif) List: $19.95 Sale: $13.99 | ![HM Digital TDS-3 TDS/C Tester HM Digital TDS-3 TDS/C Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-tds-3-tds-c-tester-82.gif) List: $19.95 Sale: $13.99 |
![HM Digital EC-3 Conductivity Tester HM Digital EC-3 Conductivity Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-ec-3-conductivity-tester-70.gif) List: $24.95 Sale: $15.99 | ![HM Digital EC-3M Conductivity Tester, High Range HM Digital EC-3M Conductivity Tester, High Range](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-ec-3m-conductivity-tester-high-range-39.gif) List: $24.95 Sale: $15.99 | ![HM Digital TDS-4 TDS Tester HM Digital TDS-4 TDS Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-tds-4-tds-c-tester-32.gif) List: $19.95 Sale: $13.99 | ![HM Digital TDS-4TM TDS/C Tester HM Digital TDS-4TM TDS/C Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-tds-4tm-tds-c-tester-58.gif) List: $24.95 Sale: $13.99 |
![HM Digital AP-1 TDS/C/F Tester HM Digital AP-1 TDS/C/F Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-ap-1-tds-c-f-tester-63.gif) List: $29.95 Sale: $19.99 | ![HM Digital AP-2 EC/C/F Tester HM Digital AP-2 EC/C/F Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-ap-2-ec-c-f-tester-65.gif) List: $29.95 Sale: $19.99 | ![HM Digital COM-80 Waterproof EC/TDS HydroTester HM Digital COM-80 Waterproof EC/TDS HydroTester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-com-80-ec-tds-hydrotester-42.gif) List: $39.95 Sale: $27.00 | ![s HM Digital PH-80 pH HydroTester s HM Digital PH-80 pH HydroTester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-ph-80-ph-hydrotester-41.gif) List: $49.95 Sale: $35.99 |
![HM Digital COM-100 Waterproof EC/TDS/C/F/Salt Tester HM Digital COM-100 Waterproof EC/TDS/C/F/Salt Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-com-100-waterproof-ec-tds-c-f-salt-tester-53.gif) List: $59.95 Sale: $45.95, 2/$85.00 | ![HM Digital PH-200 Waterproof pH Tester HM Digital PH-200 Waterproof pH Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-ph-200-waterproof-ph-tester-53.gif) List: $79.95 Sale: $55.95, 2/$105.00 | ![HM Digital ORP-200 Waterproof ORP/C/F Tester HM Digital ORP-200 Waterproof ORP/C/F Tester](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-orp-200-waterproof-orp-c-f-tester-43.gif) List: $87.95 Sale: $79.98 | ![HM Digital TM-1 Industrial Grade Digital Thermometer HM Digital TM-1 Industrial Grade Digital Thermometer](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-tm-1-industrial-grade-digital-thermometer-29.gif) |
![HM Digital Solutions HM Digital Solutions](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-solutions-34.gif) | ![HM Digital Replacement Electrodes HM Digital Replacement Electrodes](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-replacement-electrodes-30.gif) | ![HM Digital SP-C1 Replacement Sensor - for COM-100 Meter HM Digital SP-C1 Replacement Sensor - for COM-100 Meter](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-sp-c1-replacement-sensor-21.gif) List: $31.93 Sale: $19.93 | ![HM Digital SP-P2 Replacement Sensor - for PH-200 Meter HM Digital SP-P2 Replacement Sensor - for PH-200 Meter](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-sp-p2-replacement-sensor-21.gif) List: $38.20 Sale: $35.99 |
![HM Digital EC/TDS Controllers HM Digital EC/TDS Controllers](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-ec-tds-controllers-30.gif) | ![HM Digital TDS EC Monitors with Optional Tees HM Digital TDS EC Monitors with Optional Tees](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-monitor-controller-47.gif) | ![HM Digital TDS Meter Calibrations HM Digital TDS Meter Calibrations](https://s.turbifycdn.com/aah/yhst-83212413117752/hm-digital-tds-meter-calibrations-25.gif) |