Horticulture Source » Discount Specialty Farm, Greenhouse, Garden & Hydroponics Supply Store » Meters, Timers & Instruments » pH, EC, PPM & TDS Testers   Mobile   Secure |  My Account | Cart Contents | Checkout )
You have JavaScript disabled or are using a browser which does not support it. Please turn on JavaScript or consider upgrading or switching your web browser, e.g. FireFox or Opera.
Categories
* Lamps / Tubes / Bulbs ++ (543)
* Lighting Systems ++ (1134)
* Nutrients & Supplements (4210)
* Composters & Compost Tea Brewing (35)
* Organic Gardening (458)
* Leaf Shines & Washes (128)
* Pest & Disease Control (524)
* Cloning & Propagation (376)
* Grow Systems ++ (644)
! Meters, Timers & Instruments ++ (709)
 » Calibration, Storage & Cleaning Solutions, pH Up & Down (221)
 » Instruments, Thermometers, Hygrometers & Light Meters (28)
 » ! pH, EC, PPM & TDS Testers (353)
 » Timers & Lighting Controllers (107)
* Pots / Containers (909)
* Pumps, Irrigation & Watering Supplies ++ (1447)
* Grow Media (542)
* Plant Seeds (10)
* Environmental Control ++ (1967)
* Greenhouses (84)
* Grow Rooms / Tents (149)
* Reflective / B&W Films (119)
* Garden Accessories ++ (800)
* Hand Tools ++ (520)
* Gardening Books & DVDs (59)
* Growing Apparel (1)
Manufacturers more
What's New? more
Shear Perfection Platinum Series Stainless Steel Bonsai Scissors 40 mm 	 $5.45
800395
Shear Perfection Platinum Series Stainless Steel Bonsai Scissors 40 mm $5.45
$6.49
Quick Find
Quick Find
Use keywords to find the product you are looking for.
Advanced Search

Information
Who else is online?
There are 17 guests and 
1 logged in customer online.
Frequent search words
Ads

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

Show: 
What do we have here?
Displaying 241 to 260 (of 353 products) Result Pages: [<< Prev]   1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  [Next >>] 
 Sort by Popularity   Manufacturer   Product(s)   Model   Price-   Buy Now 
 CW 24-7 pH REPLACEMENT PROBE   Control Wizard   CW 24-7 pH REPLACEMENT PROBE 
24-7 Nutrient Monitor 24-7 PH REPLACEMENT PROBE The 24-7 Nutrient Meter from Control Wizard Products is a great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature and with its large illuminated display it is easy to read from a distance. Calibration screws are conveniently located on the front for easy access. 6 month l... Note: Calibration Buffer Solutions are available separately. — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 716573   $42.78 
 24-7 PPM Replacement Probe   Sun System / Sunlight Supply   24-7 PPM Replacement Probe 
24-7 Nutrient Monitor24-7 PPM Replacement Probe (716579)A great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature. Its large illuminated green LCD display allows easy reading from a distance. Both pH and PPM are temperature compensated for accurate readings. The electrodes are replaceable at a relatively low price. Calibrati... — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 716579   $42.78 
 CW SOIL, pH AND MOISTURE MONITOR   Control Wizard   CW SOIL, pH AND MOISTURE MONITOR 
Control Wizard Soil pH and Moisture Meter ACCURATE PH 7 Control Wizard Products is now introducing its Accurate pH & moisture meter for soil growers. Until now, soil growers with the need to keep careful tabs on the pH of their soil has had to rely on either cheap, poor quality meters that are very expense and hard to get. This new meter is the best of both worlds. It is rela... Note: Calibration Buffer Solutions are available separately. — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 716575   $41.65 
 Prestige PPM Meter      Prestige PPM Meter 
Prestige PPM Meter (970400)Waterproof, low power consumption and automatic switch-off feature after 10 minutes of inactivity to save battery power. - Measuring Range: 0-1999ppm/1ppm - Accuracy: 2% full scale - Operating Temperature: 5-50 C (ATC) - Power Supply: DC4x1.5V Manufacturer's Product Information ... — Ships from DL: Livermore, California USA...more info.
 dl-970400   $41.19 
 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 Vancouver, WA and/or HF: Petaluma, CA, Santa Fe Springs, CA, Broomfield, CO, Fairless Hills, PA, Grand Prairie, TX, Medley, FL USA...more info.
 hf-HI7632   $41.03 
 MI MA911B/2 REPLACEMENT PROBE FOR SMS110 (Special Order)   Milwaukee Instruments   MI MA911B/2 REPLACEMENT PROBE FOR SMS110 (Special Order) 
Replacement probe for Milwaukee pH Monitor [model SMS110] (MA911B/2)REPL.PROBE/SMS110 About the meter (no included): Model SMS110 pH monitor, range: 0.0 to 14.0 pH, with 2 point manual calibration, and accuracy of 0.2 pH. Set point range: 3.5 to 7.5 pH, and led visual alarm active when reading is higher than set point. Supplied with 12v DC power adapter, MA911B/2 double junc... — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 716661   $40.46 
 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 MSRP ... Note: Calibration Buffer Solutions are available separately. — Ships from Vancouver, WA and/or HF: Petaluma, CA, Santa Fe Springs, CA, Broomfield, CO, Fairless Hills, PA, Grand Prairie, TX, Medley, FL USA...more info.
 hf-MISE220   $40.32 
 Hanna Hydroponics pH Tester (HI99104)   Hanna Instruments   Hanna Hydroponics pH Tester (HI99104) 
HI 99104 is an ideal pocket tester designed with a 0.01 pH resolution and two point manual calibration through easy to reach trimmers, it immediately displays pH variations to reflect the smallest change in the sample. Unlike conventional testers, HI 99104 has a long and slim stem, ideal for measurements in small samples or test tubes. HI 99104 is supplied with a rugged, plastic... Note: Calibration Buffer Solutions are available separately. — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 716809   $40.28 
 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   $39.95 
 MI MA73600 REPLACEMENT PROBE/PH 51 (1/CASE)   Milwaukee Instruments   MI MA73600 REPLACEMENT PROBE/PH 51 (1/CASE) 
Milwaukee Waterproof pH Tester [model pH51] (MA73600)REPLACEMENT PROBE/PH 51 Waterproof pH tester with 2 point manual calibration, 0.1 pH accuracy, range: 0.0 to 14.0 pH, replaceable MA73600 pH electrode with battery technology providing 1500 hours of battery life. Manufacturer's Product Information 2007... This item is sold individually. — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 716601   $39.09 
 Accurate pH 2.   Control Wizard   Accurate pH 2. 
This is the Accurate pH 2. This meter is a step up from Control Wizard Products' Accurate pH 1 meter with readings that show pH in whole and tenths of a pH point. It has a two-point calibration process that is easy to do and takes little time. This calibration process requires the pH 4.0 and pH 7.0 calibration solutions (Sold Separately).It has a temperature compensation feature an... Note: Calibration Buffer Solutions are available separately. — Ships from Portland, Oregon USA...more info.
 CW502   $38.91 
 Accurate PPM 2.5   Control Wizard   Accurate PPM 2.5 
The Accurate PPM 2.5™ is CWP Instruments™ PPM meter for the hydroponic gardener. The Accurate PPM 2.5™ is a rugged, hand-held conductivity meter that reads in parts per million. This meter has rock solid features found on other brands costing 2-3 times more. CWP Instruments’™ engineers placed an emphasis on the Accurate PPM 2.5’s™ microchip and board and give it unsurpassed reli... — Ships from Portland, Oregon USA...more info.
 CW508   $38.91 
 Hanna pH Kit for Hydroponics   Hanna Instruments   Hanna pH Kit for Hydroponics 
Hanna Instruments Hanna pH Kit for Hydroponics (HI98103H)Economical pH kit for all hydroponic growers. The Checker®1 is easy to calibrate, uses a replaceable pH electrode and works for 3000 hours before you have to change the batteries! Kit includes:• HI98103• Hard Plastic Case• Screwdriver for Calibration• pH 7.01 and 4.01 Sachets• Cleaning Solution Sa... Note: Calibration Buffer Solutions are available separately. — Ships from Vancouver, WA and/or HF: Petaluma, CA, Santa Fe Springs, CA, Broomfield, CO, Fairless Hills, PA, Grand Prairie, TX, Medley, FL USA...more info.
 hf-HI98103H   $38.90 
 Replacement pH Electrode for 24-7 Nutrient Monitor.   Hanna Instruments   Replacement pH Electrode for 24-7 Nutrient Monitor. 
If your 24-7 Nutrient Monitor pH electrode breaks or wears out, order this item. This electrode is compatible with the combination Hanna meter listed on this site as HI9813-6 GROCHECK PORTABLE COMBO. ... Note: Calibration Buffer Solutions are available separately. — Ships from Portland, Oregon USA...more info.
 CW505   $37.50 
 24-7 Nutrient Monitor Replacement PPM Probe   Control Wizard   24-7 Nutrient Monitor Replacement PPM Probe 
24-7 Nutrient Monitor Replacement PPM ProbeThis item is the replacement PPM probe for the 24-7 Nutrient Monitor.The 24–7 Nutrient Meter from Control Wizard Products is a great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature and with its large illuminated display it is easy to read from a distance. Calibration screws are co... — Ships from Portland, Oregon USA...more info.
 CW506   $37.50 
 pH Tester for Hydroponics   Hanna Instruments   pH Tester for Hydroponics 
Hanna Instruments pH Tester for Hydroponics (HI99104H)Economical pH tester for all hydroponic growers. The HI99104 is easy to calibrate (no tools required!), uses a replaceable pH electrode and works for 1000 hours before having to change the batteries.HI99104 is supplied with HI1270 pH electrode, batteries, and instructions. Man... — Ships from Vancouver, WA and/or HF: Petaluma, CA, Santa Fe Springs, CA, Broomfield, CO, Fairless Hills, PA, Grand Prairie, TX, Medley, FL USA...more info.
 hf-HI99104H   $37.49 
 EC/TDS/Temp Waterproof Hydro Tester   HM Digital   EC/TDS/Temp Waterproof Hydro Tester 
HM Digital Meters EC/TDS/Temp Waterproof Hydro Tester (HMDCOM80)   KEY FEATURES Best value in its class (under $50) Measures electrical conductivity (EC), TDS and temperature. Automatic Temperature Compensation (ATC) Water-resistant housing Large LCD display Hold button and Auto shut-off Digital Calibration (push butto... — Ships from Vancouver, WA and/or HF: Petaluma, CA, Santa Fe Springs, CA, Broomfield, CO, Fairless Hills, PA, Grand Prairie, TX, Medley, FL USA...more info.
 hf-HMDCOM80   $37.38 
 MILWAUKEE MARTINI PH55 PH/TEMP PROBE ONLY   Milwaukee Instruments   MILWAUKEE MARTINI PH55 PH/TEMP PROBE ONLY 
Probe Only FOR Martini pH55/Temp Tester IP67 Waterproof pH tester with large dual-level LCD that displays pH and temperature (°C or °F). The large display shows readings in an extended range from 2.0 to 16.0 pH and simultaneously shows temperature from 5.0 to 105.0°C or 23.0 to 221.0°F. This tester has a stability indicator and hold function that freezes the display for easy and... — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 716799   $36.95 
 MA812D/2 REPLACEMENT PROBE  FOR SMS410 (1/CASE)   Milwaukee Instruments   MA812D/2 REPLACEMENT PROBE FOR SMS410 (1/CASE) 
Milwaukee TDS Monitor [model SMS410] MA812D/2 REPLACEMENT PROBE TDS monitor, range: 0-1990 ppm with accuracy of 2% full scale and with 1 point manual calibration and automatic temperature compensation. Set point range 700 to 1800 ppm, and led visual alarm active when reading is lower than set point. Supplied with 12v DC power adapter, MA812B/2 conductivity probe and 20ml. 15... This item is sold individually. — Ships from Vancouver, WA and/or SS: Ontario, CA, Samoa, CA, Livermore, CA, Denver, CO, Detriot, MI, Nashville, TN, York, PA, Pompano Beach, FL USA...more info.
 706651   $35.70 
 Replacement pH Sensor PH-200   HM Digital   Replacement pH Sensor PH-200 
HM Digital Meters Replacement pH Sensor PH-200 (HMDSPP2)This spare pH sensor is for HM Digital Waterproof pH Meter model P-200. Features Glass pH sensor and reference tube and thermister. Manufacturer's Product Information MSRP each $49.95 Dimensions3 x 3 x 7 ... Note: Calibration Buffer Solutions are available separately. — Ships from Vancouver, WA and/or HF: Petaluma, CA, Santa Fe Springs, CA, Broomfield, CO, Fairless Hills, PA, Grand Prairie, TX, Medley, FL USA...more info.
 hf-HMDSPP2   $35.36 
Displaying 241 to 260 (of 353 products) Result Pages: [<< Prev]   1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  [Next >>] 
Ads
Social Bookmark
Shopping Cart more
0 items - Add an item to the cart to get a quote!
 Estimate Shipping Costs by adding a product to the cart.
Shop By Price
Reviews more
Spectralux T5 54 Watt HO Lamp 4 ft Blue 6500K (25/Cs)
The weight on the item has been corrected but please do note ..
5 of 5 Stars!
BizRate Customer Certified (GOLD) Site - HorticultureSource.com -Specialty Gardening Supply Reviews at Bizrate


PriceGrabber User Ratings for Horticulture Source
Specials more
INVENTORY BLOWOUT SALE
MANY ITEMS FAR BELOW COST - while quantities last

SunMaster 400W MH Full Nova 6000K Lamp (Pulse start)
SunMaster 400W MH Full Nova 6000K Lamp (Pulse start)
$82.44
$72.41
Most Viewed in pH, EC, PPM & TDS Meters, Monitors, Testers, Pens & Test Kits for Water & Soil
CW 24-7 NUTRIENT MONITOR PPM/pH/TEMPERATURE
CW 24-7 NUTRIENT MONITOR PPM/pH/TEMPERATURE
RAPITEST 4 WAY ANALYZER FERTILIZER/LIGHT/MOISTURE/pH MODEL 1880
RAPITEST 4 WAY ANALYZER FERTILIZER/LIGHT/MOISTURE/pH MODEL 1880
pH CONTROL KIT (12/CASE)
pH CONTROL KIT (12/CASE)
BLUELAB COMBINATION METER MEASURES pH, NUTRIENTS AND TEMPERATURE
BLUELAB COMBINATION METER MEASURES pH, NUTRIENTS AND TEMPERATURE
MI MW802 (was SM802) SMART pH/EC/TDS COMBINATION METER (1/CASE)
MI MW802 (was SM802) SMART pH/EC/TDS COMBINATION METER (1/CASE)
CW SOIL, pH AND MOISTURE MONITOR
CW SOIL, pH AND MOISTURE MONITOR
RAPITEST SOIL pH METER
RAPITEST SOIL pH METER
RAPITEST SOIL TEST pH NPK
RAPITEST SOIL TEST pH NPK
Control Wizard Accurate pH 8
Control Wizard Accurate pH 8
ORIGINAL TRUNCHEON METER MEASURE EC AND PPM
ORIGINAL TRUNCHEON METER MEASURE EC AND PPM
HANNA WATERPROOF PH/EC/TDS/TEMP (HI98129)
HANNA WATERPROOF PH/EC/TDS/TEMP (HI98129)
PH600-AQ PH METER 10/CS
PH600-AQ PH METER 10/CS
BLUELAB GUARDIAN MONITOR
BLUELAB GUARDIAN MONITOR
Hanna Tri-Meter - pH/TDS/Temp. (HI981504/7)
Hanna Tri-Meter - pH/TDS/Temp. (HI981504/7)
REPLACEMENT PROBE FOR BLUELAB COMBINATION METER & pH MONITORS
REPLACEMENT PROBE FOR BLUELAB COMBINATION METER & pH MONITORS
FH TRI-METER CONTINUOUS MONITOR #202 PPM/pH/TEMPERATURE
FH TRI-METER CONTINUOUS MONITOR #202 PPM/pH/TEMPERATURE
pHydrion Litmus Paper. (ph Test Strip)
pHydrion Litmus Paper. (ph Test Strip)
24-7 Nutrient Monitor.
24-7 Nutrient Monitor.
Grocheck Combo Meter.
Grocheck Combo Meter.
KILL A WATT METER
KILL A WATT METER
Bestsellers
01.RAPITEST SOIL TEST pH NPK
02.Bluelab Replacement pH Probe for Guardian, Combo, & pH Meter
03.Hydroponic Essentials pH Test Kit
04.Digital pH Controller
05.Checker pH Tester with Replaceable Electrode
06.EC/TDS/Temp Waterproof Hydro Tester
07.pH Controller Sampling Kit
08.Rapitest Digital 3-Way Analyzer
09.BlueLab Combo Meter
10.Bluelab Guardian Monitor Power Supply
11.Bluelab pH Pen
12.Digital Soil Thermometer
13.pH Test Indicator 8 oz
14.pH Tester for Hydroponics
15.Probe pH Electrode
Languages
English Deutsch Español
Currencies
Feeds
RSS 2.0
Google Sitemap
ROR Sitemap
ROR Feed
Ads
Ads
Rotating 480

Customer Service

 

Shopping Help

 

My Account

 

Tools & Resources

BizRate Customer Certified (GOLD) Site - HorticultureSource.com -Specialty Gardening Supply Reviews at Bizrate PriceGrabber User Ratings for Horticulture Source ShopWiki Certified Store
Official PayPal Seal
Merchant Services
HorticultureSource.com is an Upfront Merchant on TheFind. Click for info. Secured by RapidSSL
Secured by RapidSSL
100% Satisfaction Guaranteed  Proud Hydro for Hunger Participant
 Proud Participant
APO/FPO addresses are no problem.
International orders are always welcome!
UPSFedExUSPS OnTrac CalOver EstesR+LSouthEasternSAIA
Copyright © 2005 — 2014 Usisu, Inc.: Conditions of Use VISAMasterCardAmerican ExpressDiscoverDiners ClubJBCPayPal Money Order