13,000+ results for hm digital
- TDS Meter/Monitor - Authentic HM Digital DM-1 Inline Dual Channel TDS MonitorOpens in a new window or tabBrand New$25.95Save up to 5% when you buy morejettwatersystems (4,147) 99.8%Free shippingFree returns169 sold
- HM Digital PH-80S Hydrotester pH/Temperature MeterOpens in a new window or tabBrand New$39.50valleyhydroponics (18,877) 98.6%Free shipping11 watchers
- TDS Meter/Monitor - Authentic HM Digital DM-2 Inline Dual Channel TDS MonitorOpens in a new window or tabBrand New$39.95jettwatersystems (4,147) 99.8%Free shippingFree returns58 sold
- HM Digital COM-100 Waterproof Professional Series EC/TDS Meter TestedOpens in a new window or tabPre-Owned$35.00simon_z (1,322) 99.7%Free shippingFree returns
- HM Digital ZT-2 TDS TesterOpens in a new window or tabBrand New$7.00whickeddeals (11,969) 98.8%+$4.00 shipping
- HM Digital SM-1 In-Line Single Water TDS PPM Monitor Mter/Tester, 1/4" TeeOpens in a new window or tabBrand New$23.99Save up to 7% when you buy moreeseasongear (52,326) 99.4%Free shipping733 sold
- s HM Digital COM-80 Hydrotester TDS/EC/Temperature MeterOpens in a new window or tabBrand New$19.94eseasongear (52,326) 99.4%+$5.25 shipping410 sold
- HM Digital EC-3 Conductivity Tester/Meter/ThermometerOpens in a new window or tabBrand New$17.99Save up to 7% when you buy moreeseasongear (52,326) 99.4%Free shipping603 sold
Picked For You
Sponsored | Top selling items from highly rated sellers with free shipping- HM Digital TDS-EZ TDS Meter Handheld PPM TesterOpens in a new window or tabPre-Owned$1.00brian92127 (30) 100%0 bids · Time left5d left (Thu, 09:03 AM)+$4.43 shipping
- HM Digital PPM/TDS Calibration Solution 3oz BottleOpens in a new window or tabBrand New$9.99highsierraone (598) 100%Free shipping
- HM Digital PH 4.0 buffer solution PH-P4 20ml (1-pack)Opens in a new window or tabBrand New$6.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital SM-1 In-Line Single TDS Monitor, 0-9990 ppm Range, +/- 2% ReadoutOpens in a new window or tabBrand New$32.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- Water Quality Tester Electronic Z-Tester HM DigitalOpens in a new window or tabBrand New$3.99warrregi (2,327) 100%+$6.60 shipping
- HM Digital COM-300L: Waterproof Professional Series pH/EC/TDS/Temp MeterOpens in a new window or tabBrand New$179.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns2 watchers
- COM-100 + PH-200 + PH-STOR + C342 PPM COMBO HM Digital PH/TDS/EC MeterOpens in a new window or tabBrand New$149.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital Professional Grade ORP Handheld Meter ORP-200 WaterproofOpens in a new window or tabPre-Owned$79.18Extra 10% off with couponWas: $89.98 12% offfoxx_resell (594) 98.3%Free shipping
- HM Digital ORP-200 Waterproof ORP MeterOpens in a new window or tabBrand New$89.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returnsLast one7 sold
- HM Digital TDS-EZ PPM Meter/Tester, Water Quality Purity Test Hydroponics FilterOpens in a new window or tabBrand New$10.99eseasongear (52,326) 99.4%+$5.25 shipping2,765 sold
- HM Digital TDS-EZ Water Quality TesterOpens in a new window or tabBrand New$20.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital PH 4.0 buffer solution PH-P4 20ml (1-pack)Opens in a new window or tabBrand New$6.99Save up to 30% when you buy moreTop Rated PlusFree 2-4 day shippinggetultimatenow (3,209) 100%Free returns
- HM Digital PH Meter PH-80 Handheld Water Resistant Water Quality TesterOpens in a new window or tabBrand New$39.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns71 sold
- HM Digital DM-2: Commercial In-Line Dual TDS MonitorOpens in a new window or tabBrand New$54.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns15 watchers
- HM Digital COM-80S Hydrotester TDS/EC/Temperature MeterOpens in a new window or tabBrand New$35.00valleyhydroponics (18,877) 98.6%Free shipping
- HM Digital COM-80 Pen Style TDS/EC/Temp MeterOpens in a new window or tabBrand New$28.99thehydrosource (145,533) 99.9%Free shippingLast one13 sold
- HM Digital TDS-3 TDS Handheld meter Tester + NaCl 342ppm calibration solutionOpens in a new window or tabBrand New$39.99Save up to 15% when you buy moreTop Rated PlusFree 2-4 day shippinggetultimatenow (3,209) 100%Free returns10 watchers
- HM DIGITAL COM-360 4 IN 1 METEROpens in a new window or tabBrand New$50.00hecsus4 (5,107) 99.5%+$8.99 shipping
- j TDS-3 PPM Meter, with Leather Case *** NOT HM DIGITAL Brand ***Opens in a new window or tabBrand New$2.99eseasongear (52,326) 99.4%+$5.25 shipping
- HM Digital AP-1 TesterOpens in a new window or tabBrand New$26.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- WATERPROOF EC/TDS/TEMP COMBO METER (HM COM-100) Temperature Digital LCD ScreenOpens in a new window or tabBrand New$68.00valleyhydroponics (18,877) 98.6%Free shipping7 watchers
- HM Digital HM-200 Portable pH/EC/TDS/Temp MonitorOpens in a new window or tabBrand New$224.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital COM-80 + PH-80 + PH-STOR + C342 COMBO - PH/TDS/EC/PPM MeterOpens in a new window or tabBrand New$112.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital™ pH Meter Model PH-80Opens in a new window or tabBrand New$69.99edengardensupplyllc (755) 95.8%Free shipping
- LOT 5 , HM Digital TDS-3 Green Handheld LCD 0-9990 ppm Accurate TDS Meter W-caseOpens in a new window or tabBrand New$15.00computerman5522 (1,801) 99.3%+$6.00 shipping
- HM digital PH 7.0 Buffer solution PH-P7 (20 ml) 1-PackOpens in a new window or tabBrand New$7.99Save up to 20% when you buy moreTop Rated PlusFree 2-4 day shippinggetultimatenow (3,209) 100%Free returns
- HM Digital TDS-EZ PPM Meter, Home Drinking Tap Water Quality Purity Test/TesterOpens in a new window or tabBrand New$19.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns38 sold
- HM Digital TDS-EZ PPM Meter/Tester, Water Quality Purity Test Hydroponics FilterOpens in a new window or tabPre-Owned$5.00outopawn (23,823) 96.8%1 bid · Time left4d 6h left (Wed, 02:39 PM)+$6.00 shipping
- HM Digital PH-80S Hydrotester pH/Temperature Meter newOpens in a new window or tabBrand New$34.99genuineinksonly (7,704) 98.9%Free shippingLast one1 watchers
- HM Digital TDS Meter TDS-3 Handheld Water Testing Pen for Hydroponics AquariumsOpens in a new window or tabPre-Owned$8.00bulletjones (261) 100%+$5.35 shipping
- HM Digital HM-500 HydroMaster Continuous pH/EC/TDS/Temp MonitorOpens in a new window or tabBrand New$289.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returnsLast one8 watchers
- HM Digital COM-100 Waterproof Professional Series MeterOpens in a new window or tabBrand New$129.99edengardensupplyllc (755) 95.8%Free shipping
- HM Digital PH-80S Hydrotester pH/Temperature MeterOpens in a new window or tabOpen Box$26.99dawghouseresell (2,030) 98.9%Free shipping
- HM Digital pH 80 Pen Style pH/Temp MeterOpens in a new window or tabPre-Owned$15.00elvira_.1 (1) 100%0 bids · Time left3d 5h left (Tue, 01:36 PM)+$4.38 shipping
- BRAND NEW HM Digital COM-80S Hydrotester TDS EC Temperature Meter NIBOpens in a new window or tabBrand New$25.00isellitall86 (4,107) 99%+$4.00 shipping
- HM Digital AP-1 AquaPro Water Quality Total Dissolved Solids Tester, 0-5000 ppmOpens in a new window or tabBrand New$35.95 to $58.95giftandhobbyworld (3,800) 99.3%Free shipping
- HM Digital PH-80S Hydrotester pH Temperature Meter Swimming Pool Aquarium GardenOpens in a new window or tabBrand New$22.00tycoconnections (0) 0%0 bids · Time left5d 1h left (Thu, 09:52 AM)+$4.43 shipping
- HM Digital ZT-2 TDS Water TesterOpens in a new window or tabBrand New$5.99$5 off every $55 with couponWas: $11.99 50% offtowi_9351 (2,500) 99%+$5.00 shipping
- NEW - HM Digital PH-200 Waterproof Professional SeriesOpens in a new window or tabBrand New$44.99madog03 (28) 100%0 bids · Time left1d 10h left (Sun, 06:52 PM)+$4.99 shipping
- HM Digital Handheld TDS Meter With Carrying Case TDS-3Opens in a new window or tabOpen Box$7.11Top Rated PlusWas: $22.95 69% offfsasllc (188,592) 99.3%+$4.95 shippingFree returns
- HM Digital AP-1 AquaPro Water Quality Total Dissolved Solids Tester -2023 ModelOpens in a new window or tabBrand New$39.50Save up to 10% when you buy morecaliforniagrow (1,362) 99.7%Free shipping
- HM Digital 300L Waterproof Professional Series pH/EC/TDS/Temp Meter - 2023 MODELOpens in a new window or tabBrand New$179.50californiagrow (1,362) 99.7%Free shipping
- HM Digital Handheld TDS Meter With Carrying Case TDS-3Opens in a new window or tabPre-Owned$9.99jsmith98 (422) 99%Free shipping
- HM Digital EC-3M Millisiemens Conductivity Tester with CaseOpens in a new window or tabBrand New$27.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital TDS TesterOpens in a new window or tabBrand New$19.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital COM-80 EC/TDS/Temp Waterproof Economically Priced, Reliable TDS MeterOpens in a new window or tabBrand New$40.95 to $76.95giftandhobbyworld (3,800) 99.3%Free shipping
- HM Digital DM-2EC Commercial In-Line Dual EC Monitor, 0-9990Opens in a new window or tabBrand New$49.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital TRM-1 Triple Inline TDS MonitorOpens in a new window or tabBrand New$42.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital TDS-4TM Aquarium TDS Meter with Digital ThermometerOpens in a new window or tabBrand New$24.99Save up to 5% when you buy moreTop Rated PlusFree 2-4 day shippinggetultimatenow (3,209) 100%Free returns
- HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDSOpens in a new window or tabBrand New$20.49boostedstreet (5,803) 97.1%Free shippingFree returns
- HM Digital PH Meter, TDS EZ Meter, and TDS MeterOpens in a new window or tabPre-Owned$28.00virbel-16 (15) 100%Free shipping
- HM Digital ZT-2 TDS TesterOpens in a new window or tabBrand New$6.00dabasnirde (76) 100%+$5.25 shipping
- HM Digital PM-1 OEM In-Line TDS Purity MonitorOpens in a new window or tabBrand New$49.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital PH Meter PH-80 Handheld Water Resistant Water Quality TesterOpens in a new window or tabBrand New$38.66erikol (2,038) 99.5%Was: $42.95 10% offFree shipping
- HM Digital Hydromaster Portable - pH/TDS/EC/TempOpens in a new window or tabBrand New$234.99pharmerhydro (501) 100%Free shipping
- HM Digital Replacement pH/Temp sensor for PH-200/COM-360Opens in a new window or tabBrand New$49.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital pH Meter PH-200 Waterproof Handheld Portable Water Quality Tester PenOpens in a new window or tabBrand New$79.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns24 sold
- New ListingHM Digital Hydromaster Portable - pH/TDS/EC/TempOpens in a new window or tabPre-Owned$100.00ismaenajarr9 (257) 100%+$20.00 shipping
- HM Digital COM-80 Pen Style TDS/EC/Temp MeterOpens in a new window or tabBrand New$24.99gardeninggang (176) 100%+$5.90 shipping
- HM Digital TDS-3 Water Quality Meter With Carrying Case Tester Purity PenOpens in a new window or tabOpen Box$8.50thisandthatstorex5 (2,709) 100%Free shipping
- HM Digital PH-200 Waterproof Professional SeriesOpens in a new window or tabBrand New$79.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns8 watchers
- HM Digital COM-80S Hydrotester TDS/EC/Temperature Meter Electrical ConductivityOpens in a new window or tabBrand New$25.00geeky*plush (687) 100%+$5.95 shipping
- HM PH-80 Water TesterOpens in a new window or tabPre-Owned$9.99diamondsandrust45 (65) 100%0 bids · Time left55m left (Today 09:29 AM)$14.99Buy It Now+$8.45 shipping
- HM Digital Hydromaster 500 - Continuous pH/TDS/EC/Temp meterOpens in a new window or tabBrand New$299.50californiagrow (1,362) 99.7%Free shipping
- HM Digital PH-80 pH/Temp Meter + COM-80 EC/TDS/Temp Hydro Tester BUNDLE PACKOpens in a new window or tabBrand New$79.99Top Rated Plusgetultimatenow (3,209) 100%Free 2-4 day shippingFree returns
- HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/-Opens in a new window or tabBrand New$129.99edengardensupplyllc (755) 95.8%Free shipping
- TDS Meter/Monitor - Authentic HM Digital DM-1 Inline Dual Channel TDS Monitor D1Opens in a new window or tabPre-Owned$29.99buriedtreasuresfrommetoyou (43) 100%+$4.43 shipping
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