Meters - Blowout Sale! Save up to 63%


Blowout Sale! Up to 63% off on Meters at Dupen Labs. Top brands include HM Digital, Naruekrit, iSpring, Ade Advanced Optics, Risantec, Better Water Industries, HoneForest, Oakton, Rigol, V-Resourcing, JYETech, Longruner, instecho, Hantek, Agriculture Solutions, Lxuemlu, DFROBOT, & aichose. Hurry! Limited time offers. Offers valid only while supplies last.



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
By HM Digital
In Stock
$59.95
$54.99
You Save: 8%

mpn: COM-100, ean: 0891144000007,

4.4 out of 5 stars with 68 reviews
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; 1000-9990: 10 ?S/ppm..-Temperature resolution is 0.1 degrees C/Accuracy: +/- 2pct..-EC to TDS Conversion Factor: Non-linear conversions for KCl, 442TM or NaCl solutions, selected by user..-Calibration: Digital calibration by push button..-Probe:


Naruekrit R3-XIKQ-AD0G Proof and Tralle Hydrometer with 12' Glass Test Jar
Naruekrit R3-XIKQ-AD0G Proof and Tralle Hydrometer with 12' Glass Test Jar
By Naruekrit
In Stock
$19.95
$11.50
You Save: 42%

mpn: R3-XIKQ-AD0G, ean: 0885345343162,

4.9 out of 5 stars with 30 reviews
Here's a fine quality made in France glass proof and tralle hydrometer along with a Green base glass Test jar to measure the percentage of alcohol in distilled alcohol. This is used for unsweetened distilled spirits and is not for beer and wine (see my other items, you need the triple scale for your beer, wine, wort, mash or sugar wash!). comes in a square plastic case with Instructions. This scale will determine the direct percentage of alcohol in liquids with a specific gravity less than


iSpring 3-Button Digital TDS Water Quality Test Meter Kit with Temperature Calibration, 0-9990 ppm Measurement Range, 1 PPM Accuracy
iSpring 3-Button Digital TDS Water Quality Test Meter Kit with Temperature Calibration, 0-9990 ppm Measurement Range, 1 PPM Accuracy
By iSpring
In Stock
$16.31
$13.99
You Save: 14%

mpn: TDS3, ean: 0662425070015,

4.1 out of 5 stars with 49 reviews
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 stands for Total Dissolved Solids, which is any salt, metal or mineral in the water. With the push of a button, the TDS meter tells you your overall water purity level, which will be displayed on the screen in ppm (parts per million). The lower the TDS level, the purer the water, with 0 ppm being pure H2O. The TDS meter is great for checking your


Ade Advanced Optics ade055 Large Measuring Range 0%-55% Brix Refractometer with Automatic Temperature Compensation
Ade Advanced Optics ade055 Large Measuring Range 0%-55% Brix Refractometer with Automatic Temperature Compensation
By Ade Advanced Optics
In Stock
$27.99

mpn: ade055, ean: 0704405061740,

4.0 out of 5 stars with 40 reviews
Ade Advanced Optics RHB-55ATC is a well built 0-55% Brix Refractometer with Automatic Temperature Compensation (ATC). This unit can be used for measuring the sugar levels of Sorbets, Smoothie Concentrates, Juice Concentrates, Soda Concentrates, BIG Beer Wort and Wine Grape Must. It can also be used for CNC coolant and Drawing and Stamping concentrations. Other less industrial applications are Jellies, Jams, Chutneys, Preserves, Fruits, Vegetables and Grasses (like Alfalfa, Sorghum, Wheat and


Risantec Digital PH Meter Tester Best For Water Aquarium Pool Hot Tub Hydroponics Wine - Push Button Calibration Resolution .01 / High Accuracy +/- .05 - Large LCD Display - Satisfaction Guaranteed
Risantec Digital PH Meter Tester Best For Water Aquarium Pool Hot Tub Hydroponics Wine - Push Button Calibration Resolution .01 / High Accuracy +/- .05 - Large LCD Display - Satisfaction Guaranteed
By Risantec
In Stock
$39.95
$19.39
You Save: 51%

mpn: PH-02, ean: 0712324502107,

4.7 out of 5 stars with 39 reviews
Digital pH Meter Water Tester Get the convenience of one touch accurate readings - Tired of hassling with paper strips and chemical solutions? - Need more accuracy than trying to match color charts? - Just want something that works? Your digital pH meter by Risantec solves the problem! - Specifically designed to provide convenient one touch accurate readings - Get the accuracy you deserve, with a tolerance of +/- .o5 pH with a single touch of a button. - Quickly obtain a reading with a


Better Water Industries C21044 Chrloine Pallets
Better Water Industries C21044 Chrloine Pallets
By Better Water Industries
In Stock
$25.59

mpn: C21044, ean: 0799705696211,

4.9 out of 5 stars with 146 reviews
These chlorine pellets from Better Water Industries are used to treat water to kill bacteria. This product can be used in many different applications, such as wells, agricultural, or other settings where untreated water needs to be purified.Ships fast!. Used to treat water with chlorine to eliminate bacteria. Able to be used in a multitude of applications. The pellets are 3/8 inch in size.


Water Quality Tester, Accurate and Reliable, HoneForest TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.
Water Quality Tester, Accurate and Reliable, HoneForest TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.
By HoneForest
In Stock
$14.97

mpn: HFTDS-M7, ean: 0685642943528,

4.6 out of 5 stars with 119 reviews
Super accurate, reliable and easy to use TDS, EC &Temp water tester reader, with backlit and auto-lock function, 3 years warranty and 90 days money back guarantee. This advanced digital ppm meter pen with Advanced Microprocessor Technology, combines TDS Meter(Total Dissolved Solids), EC Meter(Electrical Conductivity) and Temperature meter all in one ergonomically designed pen. Widely be used for all Water Quality Testing, Water Purification Applications, Aquaculture, Hydroponic, Pool & Spa,


Oakton Waterproof pH1 EcoTster Solution
Oakton Waterproof pH1 EcoTster Solution
By Oakton
In Stock
$71.95
$60.90
You Save: 15%

mpn: ph1, ean: 0870883002381,

4.2 out of 5 stars with 127 reviews
OAKTON's new EcoTestr is economical and easy to use. With its crystal clear, ergonomically designed display, you can easily view measurements at a glance. Each rugged tester has waterproof and dustproof housing for use in dirty and damp field conditions. Simply dip and read-the orientation of the display means there's no need to turn your head or tilt the tester. Single-junction electrode is well-suited for general purpose applications. Recessed bulb with bulb guard protects against breakage.


HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0 - 9990 ppm, 1 ppm Resolution, +/- 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc
HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0 - 9990 ppm, 1 ppm Resolution, +/- 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc
By HM Digital
In Stock
$16.95

mpn: TDS-3, ean: 0603964473554,

4.5 out of 5 stars with 40 reviews
Specifications 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. 0.5) ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit) Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent) Battery life: 1000 hours of


Rigol BAG-DS1000 Instrument Carry Case for a DS1000 Series Oscilloscope
Rigol BAG-DS1000 Instrument Carry Case for a DS1000 Series Oscilloscope
By Rigol
In Stock
$58.00
$54.55
You Save: 6%

mpn: BAG-DS1000,

4.8 out of 5 stars with 93 reviews
Rigol BAG-DS1000 Instrument Carry Case for a DS1000 Series Oscilloscope. (For DSA800s, DS1000B and DS2000-series, the larger BAG-G1 is recommended to ensure good fit with the required padding.)Instrument Carry Case for a DS1000 Series Oscilloscope. Instrument Carry Case. For a DS1000 Series Oscilloscope. Several Compartments for Accessories. Shoulder Strap.


V-Resourcing Wine Refractometer, Hand Held Brix/Alcohol Refractometer with ATC for Wine Making Homebrew Kit, Dual Scale( Brix 0-40%, Alcohol 0-25%)
V-Resourcing Wine Refractometer, Hand Held Brix/Alcohol Refractometer with ATC for Wine Making Homebrew Kit, Dual Scale( Brix 0-40%, Alcohol 0-25%)
By V-Resourcing
In Stock
$42.99
$15.99
You Save: 63%

mpn: VLT056, ean: 0605244352139,

4.9 out of 5 stars with 16 reviews
Please note: V-Resourcing is the ONLY Authorized Seller. Unauthorized sellers cannot guarantee or offer warrantees. This brix refractometer includes a Alcohol scale. It is mainly designed to test the sugar content in original grape juice, then the alcohol level in the wine(which will be brewed from the grape juice) can be known from the scale, and alcohol-content by volume of the grape wine made from the fermented grape juice. SPECIFICATIONS:  Brix Scale Range: 0~40% Bx  Resolution: 0.2%


Kuman DSO 138 DIY KIT Open Source 2.4'' TFT 1Msps Digital Oscilloscope Kit with DIY Parts + Probe 13803K (SMD pre-soldered)
Kuman DSO 138 DIY KIT Open Source 2.4" TFT 1Msps Digital Oscilloscope Kit with DIY Parts + Probe 13803K (SMD pre-soldered)
By JYETech
In Stock
$39.99
$22.75
You Save: 43%

mpn: 3O-IUX5-O0TZ, ean: 6932083805330,

4.2 out of 5 stars with 22 reviews
Kuman JYE DSO138 is partially open-sourced. This opens the possibility for users to add different features or develop new applications on the hardware. DSO138 oscilloscope DIY kit Major features : Analog bandwidth: 0 - 200KHz Sampling rate: 1Msps max Sensitivity: 10mV/Div - 5V/Div Sensitivity error: < 5% Vertical resolution: 12-bit Timebase: 10us/Div - 500s/Div Record length: 1024 points Built-in 1KHz/3.3V test signal Waveform frozen (HOLD) function available 9V DC (8 - 12V


Longruner DSO138 Open Source 2.4'' TFT Digital Oscilloscope Kit 1Msps with Probe Assembled Vision (We (TFT Digital) (Open Source)
Longruner DSO138 Open Source 2.4" TFT Digital Oscilloscope Kit 1Msps with Probe Assembled Vision (We (TFT Digital) (Open Source)
By Longruner
In Stock
$39.00
$25.49
You Save: 35%

mpn: 13805,

4.2 out of 5 stars with 110 reviews
The Longruner DSO138 is full assembled ,not DIY KIT! It contains only the basic oscilloscope functions with no fancy features. Simplicity in structure and easiness in assembly/operation are among the main targets of the design. For these purpose DSO138 uses mostly through-hole parts. The heart of DSO138 is a Cortex-M3 ARM processor (STM32F103C8) from ST. It uses 2.4-inch TFT LCD (320 X 240 dot-matrix, 262K colors) as its display element and displays nice and clear wave forms. Detailed


Digital PH Meter, 0.01 Resolution Pocket Size Water Quality Tester with ATC 0-14 pH Measurement Range for Household Drinking Water, Aquarium, Swimming Pools, Hydroponics
Digital PH Meter, 0.01 Resolution Pocket Size Water Quality Tester with ATC 0-14 pH Measurement Range for Household Drinking Water, Aquarium, Swimming Pools, Hydroponics
By instecho
In Stock
$13.99

mpn: ph meter, ean: 0606682244642,

4.9 out of 5 stars with 115 reviews
Specification:▲Measuring range: 0.00-14.00PH ▲Resolution: 0.01 pH ▲Accuracy: ± 0.1 pH ▲Operating Temperature: 0-80 ▲Dimension: 153mm x 29mm x 16mm ▲Life expectancy: about 500 hours ▲Relative humidity➤•HIGH ACCURACY: the pH meter with auto calibration button can automatically identify standard buffer solution of pH4.00, pH9.18, and pH6.86; its high accuracy 0.03pH range of error ensures more reliable results; automatically temperature compensation(ATC) ranges from


Hantek HT6022BE20Mhz 6022be PC Based USB Digital Storage Oscilloscope, 20 MHz Bandwidth
Hantek HT6022BE20Mhz 6022be PC Based USB Digital Storage Oscilloscope, 20 MHz Bandwidth
By Hantek
In Stock
$70.93
$69.99
You Save: 1%

mpn: HT6022BE20Mhz, ean: 6123554614371,

4.2 out of 5 stars with 73 reviews
Extremely Durable Anodized Aluminum Case Features one USB 2.0 port and the Standard USBXITM interface, No Extra Power Cord Needed, Works with a Laptop or Desktop, Compact size, easy to carry, Supported Windows OS: Windows 2000/NT/XP/VISTA/Windows 7, FFT Saves Waveform on screen in TXT, JPG/BMP, MS Excel/Word formats, Saved waveform files can be sent as email attachments, Channel: 2 Channels Bandwidth: 20MHzShot bandwidth: DC to 20MHzInput Impendence: 1Mohm 25pFMax. Sample rate: 48MS/vertical


Antifreeze Refractometer for Glycol, Antifreeze, Coolant and Battery Acid. Antifreeze Tester for Measuring Freezing Point of Automobile Antifreeze and Battery Fluid Condition.
Antifreeze Refractometer for Glycol, Antifreeze, Coolant and Battery Acid. Antifreeze Tester for Measuring Freezing Point of Automobile Antifreeze and Battery Fluid Condition.
By Agriculture Solutions
In Stock
$21.99

mpn: WL0037BK-ATC, ean: 0603097376739,

4.2 out of 5 stars with 21 reviews
Details: This optical refractometer is designed for measuring coolant and antifreeze based on ethylene glycol or propylene glycol ,battery fluid condition and screenwash antifreeze (windshield washer fluid) based on ethanol as well as on isopropyl alcohol. Please refer to the picture of display scale(picture 5), from left to right, the first scale is for measuring the Specific Gravity of Battery Acid, the second one is for measuring the freezing point of antifreeze system based on propylene


TDS Meter Digital Water Tester, Lxuemlu 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal TDS Test Kit for Drinking Water, Aquariums and More
TDS Meter Digital Water Tester, Lxuemlu 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal TDS Test Kit for Drinking Water, Aquariums and More
By Lxuemlu
In Stock
$19.99
$12.99
You Save: 35%

ean: 0665059127544,

4.8 out of 5 stars with 81 reviews
What Is TDS and Why Should You Care TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. The lower the TDS level in the water, the more efficiently your bodys cells can use the water. Conversely, higher TDS levels can indicate water that is more difficult for your body to use and has more contaminants that can pose health risks. Multipurpose ppm Meter This water quality test meter is ideal for all water purification applications, drinking water, water filtration and


V-Resourcing Pet Dog & Cat Refractometer, Pet Urine Specific Gravity (1.000~1.060) Clinical Refractometer with Serum or Plasma Protein Test (2~14 g/100ml) for Veterinary Cat,Dog, Pets
V-Resourcing Pet Dog & Cat Refractometer, Pet Urine Specific Gravity (1.000~1.060) Clinical Refractometer with Serum or Plasma Protein Test (2~14 g/100ml) for Veterinary Cat,Dog, Pets
By V-Resourcing
In Stock
$32.99
$25.99
You Save: 21%

mpn: VLT065, ean: 0671423645828,

4.2 out of 5 stars with 45 reviews
Please note: V-Resourcing is the ONLY Authorized Seller. Unauthorized sellers cannot guarantee or offer warrantees. Product Overviews: This Pet Urine Specific Gravity Refractometer is intended for both clinical usage and Veterinary. It provides triple scale which can read Specific Gravity (S.G.) of Dog Urine, Specific Gravity (S.G.) of Cat Urine,and Serum or Plasma Protein (SP). Specification: Item: Pet Urine Specific Gravity Refractometer ATC: Automatic Temperature Compensation


DFRobot Gravity: Analog Turbidity Sensor for Arduino
DFRobot Gravity: Analog Turbidity Sensor for Arduino
By DFROBOT
In Stock
$14.90

mpn: SEN0189, ean: 6959420909674,

4.4 out of 5 stars with 34 reviews
INTRODUCTION The arduino turbidity sensor detects water quality by measuring level of turbidity. It is able to detect suspended particles in water by measuring the light transmittance and scattering rate which changes with the amount of total suspended solids (TSS) in water. As the TTS increases, the liquid turbidity level increases. This arduino turbidity sensor have both analog and digital signal output modes. You can select the mode according to the MCU as threshold is adjustable in


3-in-1 Animal Clinical Refractometer, Measuring Animal's Health Index of Urine Specific Gravity and Serum Protein, Ideal for Veterinary and Pet Owner
3-in-1 Animal Clinical Refractometer, Measuring Animal's Health Index of Urine Specific Gravity and Serum Protein, Ideal for Veterinary and Pet Owner
By aichose
In Stock
$25.99

mpn: SR0021-ATC, ean: 0698775153863,

4.6 out of 5 stars with 114 reviews
Designed for dogs and cats but can still be used to measure other small & large animals, like sheep or horse, etc.With this refractometer, you can: Do a quick & affordable test for animal health index without high cost laboratory analysis.Normal urine specific gravity range: Cats; 1.001-1.080 S.G. Dogs: 1.001-1.065 S.G.Triple scales: the left one is for testing urine specific gravity of large animals like dog, the middle one is for testing urine specific gravity of small animals like cat, the



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