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What do we have here?
Meters, Timers & Instruments: pH, EC, PPM & TDS Testers: pH, EC, PPM & TDS Meters, Monitors, Testers, Pens & Test Kits for Water & Soil

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What do we have here?
Displaying 181 to 200 (of 291 products) Result Pages: [<< Prev]   1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  [Next >>] 
 Sort by Popularity   Manufacturer   Product(s)   Model   Price-   Buy Now 
 Dosatron Flow Restrictor - 3/4 in 14 GPM - D14 Series      Dosatron Flow Restrictor - 3/4 in 14 GPM - D14 Series 
Flow Restrictors limit the flow of liquid in the line. It is recommended to install a flow restrictor on the inlet side of the Dosatron unit if there is any possibility of overflowing the unit. Choose from 3/4 in 10 GPM or 3/4 in 14 GPM.... — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 709022   $51.70 
 Replacement Probe for GroChek.   Hanna Instruments   Replacement Probe for GroChek. 
Replacement Probe for Hanna Gro Chek meter series. HI1286 PROBE FOR HI981401Replacement Probe for Hanna Grow Check meter series. This will replace the pH elecrtrode in all models of the Grow Check.... — Ships from Portland, Oregon USA....more info.
 HY1801   $50.99 
 REPLACEMENT ELECTRODE REPLACEMENT FOR OAKTON BASIC WATERPROOF pH TESTER (35624-29)   Oakton   REPLACEMENT ELECTRODE REPLACEMENT FOR OAKTON BASIC WATERPROOF pH TESTER (35624-29) 
Oakton® Basic pHTestr® ELECTRODE REPLACEMENT FOR PH 2 NEW!Waterproof, dustproof & floatsAutomatic Temperature Compensation (ATC)Replaceable electrode lets you reuse same meter bodyPush-button three-point calibration Hold function; auto-off; error messagesAuto buffer recognitionCertifiable to IP67 standardsSingle junction-1 to 15.0 pH ... Note: Calibration Buffer Solutions are available separately. — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 716037   $50.93 
 HM WATERPROOF EC/TDS/TEMP COMBO METER   HM Digital   HM WATERPROOF EC/TDS/TEMP COMBO METER 
HM Digital Waterproof EC-TDS-TEMP Combo Meter COM-100 Measures electrical conductivity (EC), total dissolved solids (TDS) and temperature. Three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor. Automatic Temperature Compensation (ATC) using three temperature coefficients. Waterproof housing. Measurement Range: 0-9990 µS; 0-8... — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 716160   $50.55 
 Waterproof EC/TDS/Temp Combo Meter   HM Digital   Waterproof EC/TDS/Temp Combo Meter 
HM Digital Meters Waterproof EC/TDS/Temp Combo Meter (HMDCOM100) Measures EC, TDS and temperature. It has three different calibration options (KCl, 442TM, NaCl), each with its own non-linear conversion factor, and Automatic Temperature Compensation (ATC) using three temperature coefficients. Measurement Range: 0-9990 uS; 0-8560 ppm (auto ranging). ... — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-HMDCOM100   $50.55 
 Oakton Waterproof EcoTestr pH1   Oakton   Oakton Waterproof EcoTestr pH1 
Oakton Waterproof EcoTster pH1 (OK35423-00)Ideal for Student, Hydroponics, and Hobbyist use! Economical, pocket sized meter is perfect for less demanding applications Waterproof, dustproof housings float Easy to use; push-button calibration with auto buffer recognition Includes transparent electrode cover / sample cup Push-button calibration, HOLD function, and error messagesOAKT... — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-OK35423-00   $49.49 
 pH Controller Sampling Kit   HydroFarm   pH Controller Sampling Kit 
Autopilot pH Controller Sampling Kit (APCEPH1SK)pH sampling assembly, allows for more accurate readings. Sampling kit includes a submersible pump, 3/4" x 5' tubing and molded sensor assembly with mounting bracket. The sampling assembly provides a stable method to mount the pH and temperature sensors. It uses a submersible pump to mix the water and to provide constant water fl... — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-APCEPH1SK   $49.47 
 WATERPROOF ECOTESTR 1   Oakton   WATERPROOF ECOTESTR 1 
Oakton® EcoTestr™ PH1 Economical, pocket-sized meter Waterproof, dust proof housing that floats Easy to use; push-button calibration with auto buffer recognition Includes transparent electrode cover / sample cup Push-button calibration, HOLD function, and error messages Range: 0.0 to 14.0 pH Power: four 1.5 V button cell batteries (included)... — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 716104   $49.27 
 DiST 1 TDS Tester   Hanna Instruments   DiST 1 TDS Tester 
Hanna Instruments DiST 1 TDS Tester (HI98301)DiSTs are rugged and reliable pocket-sized testers that offer quick and accurate readings of conductivity or TDS. The DiST family of testers is widely used for monitoring EC/TDS in drinking water, water conditioning, reverse osmosis, cooling towers, wastewater, laboratories, agriculture, aquaculture and aquariums, hydroponics, and the pr... Note: Calibration Buffer Solutions are available separately. — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-HI98301   $48.83 
 WATERPROOF ECOTESTR TDS LOW   Oakton   WATERPROOF ECOTESTR TDS LOW 
Oakton® Ecotestr™ TDS LowNew OAKTON ECOTestr TDS Low pocket meter features a large ergonomically designed display so that you can easily view measurements at a glance. The stainless steel electrodes are both rugged and chemical resistant, for use in a variety of applications. Other features include ATC (Automatic Temperature Compensation), Hold Function, it is completely wate... Note: Calibration Buffer Solutions are available separately. — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 716115   $47.71 
 pH Checker 1.   Hanna Instruments   pH Checker 1. 
HANNA pH CHECKER 1 (LIQUIDS ONLY) Digital readout.Not temperature compensating but a very good value. We don't get many of these returned so we keep on selling them. Out-performs their more expensive models. Replaceable electrode.... — Ships from Portland, Oregon USA....more info.
 HY1861   $46.38 
 Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter   Bluelab   Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter 
Bluelab Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter (BLU24102)Easy to clean because of its bullet shaped glass bulb. Fully waterproof and less fragile than all-glass electrodes because of its tough polypropylene barrel. Gel filled (non-refillable) making it maintenance free and a double junction reference providing longer life! ... Note: Calibration Buffer Solutions are available separately. — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-BLU24102   $46.20 
 REPLACEMENT PROBE FOR BLUELAB COMBINATION METER & pH MONITORS   Bluelab   REPLACEMENT PROBE FOR BLUELAB COMBINATION METER & pH MONITORS 
Blue Lab Combo Meter PH REPLACEMENT ELECTRODE BLUE Light weight and portableMeasures pH, Nutrient and TemperatureThree display options for nutrient - EC, CF, ppm (500 scale)Two display options for temperature (C or F)Three calibration points, 4, 7 and 10 pHTemperature at a push of a buttonSimple push button pH calibrationAuto turn off functionLarge 13mm (1/2) digital display ... Note: Calibration Buffer Solutions are available separately. — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 716445   $46.20 
 Accurate pH 7.   Control Wizard   Accurate pH 7. 
Control Wizard Products is now introducing its Accurate pH 7 pH-moisture meter for soil growers. Until now, soil growers with the need to keep careful tabs on the pH of their soil have had to rely on either cheap and hokey junk meters or meters that are very expense and hard to get. This new meter is the best of both worlds. It is relatively inexpensive and is manufactured to high ... Note: Calibration Buffer Solutions are available separately. — Ships from Portland, Oregon USA....more info.
 CW520   $45.24 
 MI MA73076 REPLACEMENT PROBE FOR C65/T76 (1/CASE)   Milwaukee Instruments   MI MA73076 REPLACEMENT PROBE FOR C65/T76 (1/CASE) 
Milwaukee Waterproof EC Tester [model C65] (MA73076)REPLAPROBE/C65/T76(DS Model C65 Waterproof conductivity tester with automatic temperature compensation and 1 point manual calibration range: 0 to 1999 S/cm, replaceable MA73075 probe. Manufacturer's Product Information 2007 MSRP Each $52.95 Case W... This item is sold individually. — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 716611   $45.10 
 Probe pH Electrode   FHD (Future Harvest Development)   Probe pH Electrode 
Nutradip (Tri Meter) Probe pH Electrode (ND1100053)Nutradip pH Probes are a reliable way to measure acidity in your nutrient solution. This probe is a continuous monitoring pH meter with automatic temperature compensation, with DC power built in for portability. Nutradip probes are engineered for accuracy and durability, helping growers measure and monitor their success for over 15... Note: Calibration Buffer Solutions are available separately. — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-ND1100053   $44.87 
 Control Wizard Accurate pH 8   Control Wizard   Control Wizard Accurate pH 8 
Control Wizard Accurate pH 8 ACCURATE PH 8 Professional pH and Moisture Meter with 12" probe. Operation is simple. Clean the electrodes and place the meter into the soil. A pH reading is automatically displayed. Press the white button and a moisture reading is displayed. It works by utilizing the electronic ground field effect of the earth and two dissimilar metals. No batter... Note: Calibration Buffer Solutions are available separately. — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 716578   $44.55 
 GroChek EC Electrode   Hanna Instruments   GroChek EC Electrode 
Hanna Instruments GroChek EC Electrode (HI7632)Hanna replacement EC electrode for pocket testers. Manufacturer's Product Information MSRP each $57.95 Dimensions3 x 1.8 x 6.5 Case Quantity1 ... — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-HI7632   $43.55 
 Dosatron Flow Restrictor - 3/4 in 10 GPM - D25 Series      Dosatron Flow Restrictor - 3/4 in 10 GPM - D25 Series 
Flow Restrictors limit the flow of liquid in the line. It is recommended to install a flow restrictor on the inlet side of the Dosatron unit if there is any possibility of overflowing the unit. Choose from 3/4 in 10 GPM or 3/4 in 14 GPM.... — Ships from SS: WA, CA, CO, MI, TN, PA, FL USA. Note: the WA warehouse is moving in Jul & Aug, some orders may be delayed 1-2 days....more info.
 709020   $42.90 
 Double Junction PH Probe for MW100   Milwaukee Instruments   Double Junction PH Probe for MW100 
Milwaukee Instruments Double Junction PH Probe for MW100 (MISE220)Double junction pH electrode with 1 meter ccable and gel filled electrolyte solution for all "MW" and old style "SM" pH units.**Note: This probe replaces the old MA911B/1 Manufacturer's Product Information ... Note: Calibration Buffer Solutions are available separately. — Ships from HF: OR, CA, CO, PA, TX, FL USA....more info.
 hf-MISE220   $42.23 
Displaying 181 to 200 (of 291 products) Result Pages: [<< Prev]   1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  [Next >>] 
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