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HM Digital - Mega Sale! Save up to 28%


Mega Sale! Up to 28% off on HM Digital products at Graph Barometer. Hurry! Limited time offers. Offers valid only while supplies last.



HM DIGITAL TRM-1 TDS Meter Triple Inline TDS Monitor Test TDS Levels at 3 points, Come with 1/4'' T Fittings, For DI / RO System &More
HM DIGITAL TRM-1 TDS Meter Triple Inline TDS Monitor Test TDS Levels at 3 points, Come with 1/4" T Fittings, For DI / RO System &More
In Stock
$39.49

mpn: HM TRM-1, ean: 0612953889801,

Triple Inline TDS MonitorThree sensor TDS monitor that is ideal for checking TDS levels at 3 points, such as with DI/RO (deionization / reverse osmosis), or multiple points in an RO system, and more. FEATURES Displays TDS levels of the three sensing ...


HM DIGITAL EC Meter EC-3M Electrical Conductivity Tester, Handheld Portable EC Temperature Water Test 0-9990 µS, 1µS Resolution, +/- 2% Readout Accuracy,With Leather case
HM DIGITAL EC Meter EC-3M Electrical Conductivity Tester, Handheld Portable EC Temperature Water Test 0-9990 µS, 1µS Resolution, +/- 2% Readout Accuracy,With Leather case
In Stock
$21.69
$21.64

mpn: 9002, ean: 0603964473448,

FeaturesFor Commercial Use Includes a Case with belt clip Auto-off Function: Shuts Off Automatically After 10 Minutes of non-use Built-in digital thermometer Display: large LCD screen Factory Calibrated: factory calibrated to a 1.413 mS KCl solution....


HM Digital® TDS-3 TDS meter w/ATC, carry case & NaCl 342ppm calibration solution
HM Digital® TDS-3 TDS meter w/ATC, carry case & NaCl 342ppm calibration solution
In Stock
$24.41

mpn: TDS-3 & C342,

HM DIGITAL TDS-3 TDS/Temp Meter with Vinyl Case, + 342 ppm TDS solution 90 ml Authorized Distributor - Brand New Meter with 3-Years USA Manufacture Warranty! FEATURES Ideal for commercial use. Includes a carrying case with belt clip. Highly efficient...


HM Digital ZT-2 TDS Meter
HM Digital ZT-2 TDS Meter
In Stock
$22.99

mpn: HM Digital-ZT-2, ean: 0132017517810,

Description:?HM Digital ZT-2 TDS Meter Specifications: Range: 0 - 999 ppm (mg/L) Resolution: 1 ppm (0-999 ppm) Accuracy: +/- 3%Conversion Factor: NaCl (avg. 0.5)Power source: 2 x 1.5V button cell batteries (included) (357A)Battery life: Approx. 1000 ...


HM Digital Pocket Sized TDS Meter with Digital Thermometer TDS-4TM-- (Package...
HM Digital Pocket Sized TDS Meter with Digital Thermometer TDS-4TM-- (Package...
In Stock
$99.99

mpn: CWD-HM-DIGITAL-TDS-4TM,new+4, ean: 0701003190889,

TDS Range: 0-9990 ppm (mg/L) Temp. Range: 0-80 degrees Celsius Resolution: 0-999: 1 ppm; 1000-9990: 10 ppm (indicated by a 'x10' icon) Temperature Resolution: 0.1 degree Celsius (Celsius only) Accuracy: +/- 2% EC-to-TDS Conversion Factor: NaCl (avg. ...


HM Digital TDS-4 Total Dissolved Solids Pocket Size Meter-- (Package Of 3)
HM Digital TDS-4 Total Dissolved Solids Pocket Size Meter-- (Package Of 3)
In Stock
$79.99

mpn: CWD-HM-DIGITAL-TDS-4,new+3, ean: 0701003167157,

Product Description: How Pure is Your Water? A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or ...


HM Digital Pocket Sized TDS Meter with Digital Thermometer TDS-4TM-- (Package...
HM Digital Pocket Sized TDS Meter with Digital Thermometer TDS-4TM-- (Package...
In Stock
$63.99

mpn: CWD-HM-DIGITAL-TDS-4TM,new+3, ean: 0701003167164,

Handheld Hydro Tester pH Meter.10 minute auto-off function to conserve battery life. High Quality. 3 Pack. ...


HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy (Limited Edition)
HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy (Limited Edition)
In Stock
$15.99

ean: 0604945371869,

Product Description Product Description: A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mine...


HM Digital SP-O2 Replacement Sensor for ORP-200 Testing Meter
HM Digital SP-O2 Replacement Sensor for ORP-200 Testing Meter
In Stock
$60.16

mpn: HM DIGITAL SP-O2, ean: 0799705707290,

We have a great selection of Parts & Accessories products including the HM Digital SP-O2 Sensor Replacement for ORP-200 Testing Meter (HM DIGITAL SP-O2) at unbeatable prices.The HM Digital SP-O2 Replacement Sensor for ORP-200 Testing Meter is an oxid...


HMD PH-200 Digital Professional Waterproof 0-14 PH & Temperature Meter
HMD PH-200 Digital Professional Waterproof 0-14 PH & Temperature Meter
In Stock
$67.59

mpn: PH-200, ean: 7466655990043,

Product Description: HM Digital's PH-200 is a digital waterproof pH meter (aka pH tester or pH pen) that is ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientifi...


HM Digital COM-100 Waterproof Combo Meter for EC, TDS and Temperature, 1-Pack
HM Digital COM-100 Waterproof Combo Meter for EC, TDS and Temperature, 1-Pack
In Stock
$59.95
$54.99
You Save: 8%

mpn: COM-100, ean: 0891144000007,

OM-100 Features: -Combo meter.-Electrical Conductivity Range: 0 - 9990 ?S; 0 - 9.99 Ms..-TDS Range: 0 - 8560 ppm (mg/L); 0 - 8.56 ppt..-Temperature Range: 0-80 degrees C; 32-176 degrees F..-Resolution: 0-99: 0.1 ?S/ppm/MS/ppt; 100-999: 1 ?S/ppm; 1000...


HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy
HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy
In Stock
$23.24
$19.95
You Save: 14%

mpn: TDS-3, ean: 0826333000001,

Product Description: A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. Wi...


HM Digital AP-1 + 342 ppm Solution, AquaPro TDS/ºC/ºF Meter/Tester/Thermometer
HM Digital AP-1 + 342 ppm Solution, AquaPro TDS/ºC/ºF Meter/Tester/Thermometer
In Stock
$28.50

mpn: AP-1_C342,

HM Digital AP-1 AquaPro Water Quality TDS/ºC/ºF Tester + 342 ppm 60 ml solution - Authorized Distributor - Brand New Meter with 1-Year USA Manufacturer Warranty!...


Commercial In-Line Dual TDS Monitor
Commercial In-Line Dual TDS Monitor
In Stock
$86.31
$61.95
You Save: 28%

mpn: DM-2, ean: 0799705707115,

Commercial In-Line Dual TDS Monitor DM-2 with Advanced Microprocessors.The DM-2 TDS Meter installs on industrial systems such as car washes, window washing, manufacturing, and food processing. The Commercial In-Line Dual Monitor is highly efficien...


HM Digital TDS-4 Pocket Size TDS Tester Meter with 0-9990 ppm Measurement Range, 1 ppm Resolution, 2% Readout Accuracy
HM Digital TDS-4 Pocket Size TDS Tester Meter with 0-9990 ppm Measurement Range, 1 ppm Resolution, 2% Readout Accuracy
In Stock
$19.80
$16.93
You Save: 14%

mpn: TDS-4, ean: 0744211823583,

Product Description: How Pure is Your Water? A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or ...


HM Digital TDS-4 Total Dissolved Solids Pocket Size Meter-- (Package Of 4)
HM Digital TDS-4 Total Dissolved Solids Pocket Size Meter-- (Package Of 4)
In Stock
$103.99

mpn: CWD-HM-DIGITAL-TDS-4,new+4, ean: 0701003190872,

Product Description: How Pure is Your Water? A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or ...


(Package Of 7) HM Digital ZT-2 TDS Meter
(Package Of 7) HM Digital ZT-2 TDS Meter
In Stock
$159.99

mpn: CWD-HM-DIGITAL-ZT-2,new+7, ean: 0700999872656,

The TDS Meter helps you put a number on what your taste buds are already telling you about what's in your water. It measures for totally dissolved solids in water that can give it a taste. The higher the reading on the water the more substances disso...



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