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Lab & Scientific Products - Blowout Sale! Save up to 73%


Blowout Sale! Up to 73% off on Lab & Scientific Products at Graph Barometer. Top brands include Milwaukee, HHTD, Hanna Instruments, Extech, Kestrel, YSI, Myron L, REED Instruments, Apera Instruments, LLC, Oakton, Testo, ORION, & Digi-Sense. Hurry! Limited time offers. Offers valid only while supplies last.



Milwaukee pH58 LED Combination Waterproof Pocket pH/ORP/Temp Tester with Replaceable Electrode, -2.00 to 16.00 pH, +/-0.05 pH Accuracy, 0.01 pH Resolution
Milwaukee pH58 LED Combination Waterproof Pocket pH/ORP/Temp Tester with Replaceable Electrode, -2.00 to 16.00 pH, +/-0.05 pH Accuracy, 0.01 pH Resolution
SKU: #PH58
In Stock
$124.00

sku: PH58, mpn: pH58, ean: 0810666001583,

Milwaukee pH58 LED Combination Waterproof Pocket pH/ORP/Temp Tester with Replaceable Electrode, -2.00 to 16.00 pH, +/-0.05 pH Accuracy, 0.01 pH Resolution is convenient and easy to use.0.01 pH Resolution. Easy to use. ...


Digital Coffee Concentration Refractometer , Brix & TDS Densitometer Meter
Digital Coffee Concentration Refractometer , Brix & TDS Densitometer Meter
By HHTD
In Stock
$199.99

mpn: CFTEST018, ean: 0723740020991,

1.Power On: Press key "READ" 1 second only. 2. Scale converting: press key "SCALE" 1 second to choose the unit Brix or Concentration, "S01" is for Brix %, this also can test all liquid with sugar such as juice, milky tea ect, range is 0-30%. "S02" is for...


Hanna Instruments HI98129 Meter, pH/EC/TDS/Temp , 10'' Height, 11'' Wide, 20'' Length
Hanna Instruments HI98129 Meter, pH/EC/TDS/Temp , 10" Height, 11" Wide, 20" Length
In Stock
$150.00

mpn: HI98129, ean: 4016138134506,

This is range: 0.00 to 14.00 pH/0 to 3999 us/cm/0 to 2000 ppm/0.0 to 60.0°C/32 to 140.0°F with resolution: 0.01 pH/1 us/cm/1 ppm/0.1°C/0.1°F and accuracy: ±0.05 pH/±2 percent F.Use./±0.5°C/±1°fmeets customer requirement.Made in United States...


Extech 341350A-P Oyster Series pH/Conductivity/TDS/ORP/Salinity Meter
Extech 341350A-P Oyster Series pH/Conductivity/TDS/ORP/Salinity Meter
In Stock
$479.99

mpn: 341350A-P, ean: 0793950343524,

Extech 341350A-P Oyster Series pH/Conductivity/TDS/ORP/Salinity Meter, Large LCD built into adjustable "flip-up" cover displays measurement and Temperature simultaneously 341350A-P is a pH/Conductivity/TDS/ORP/Salinity meter with a large LCD built into th...


Kestrel 0852HVG 5200 Professional Environmental Meter, 5.1' Height, 1' Wide, 1.9' Length
Kestrel 0852HVG 5200 Professional Environmental Meter, 5.1' Height, 1' Wide, 1.9' Length
In Stock
$282.45
$245.44
You Save: 13%

mpn: 0852HVG, ean: 0730650001903,

4.4 out of 5 stars with 51 reviews
Kestrel 0852HVG 5200 Professional Environmental Meter, 5.1' Height, 1' Wide, 1.9' LengthThe Kestrel 5200 Pocket Weather Meter is Kestrel's Professional meter with the intended markets of construction, pouring concrete, balancing HVAC systems, and spraying...


YSI pH10A pH 0A pH/Temperature Pen Tester
YSI pH10A pH 0A pH/Temperature Pen Tester
By YSI
In Stock
$124.51
$114.00
You Save: 8%

mpn: pH10A,

4.7 out of 5 stars with 12 reviews
The EcoSense pH10A pen-style instrument provides an ultimate feature set over similar competitive models. The pH10A features an easy-to-use graphic interface, simple one-hand operation, memory, and low cost of ownership over the life of the product. The e...


YSI ProODO Digital Probe and 1 Meter Cable Assembly for Optical Dissolved Oxygen/Temperature Meter
YSI ProODO Digital Probe and 1 Meter Cable Assembly for Optical Dissolved Oxygen/Temperature Meter
By YSI
In Stock
$683.35

mpn: 626250-1,

YSI ProODO Digital Probe and 1 Meter Cable Assembly for Optical Dissolved Oxygen/Temperature MeterThe ProODO cable's can be ordered in lengths of 1 meters. Cables come with the ODO optical DO sensor and sensing cap. Cables over 1-meter also come with the ...


Extech MO55 Compact, Combination Pin and Pinless Moisture Meter
Extech MO55 Compact, Combination Pin and Pinless Moisture Meter
In Stock
$128.38
$120.84
You Save: 6%

mpn: MO55,

4.3 out of 5 stars with 20 reviews
Lab Equipment & Instruments. Extech MO55 Compact, Combination Pin and Pinless Moisture Meter. Manufactured by COLE-PARMER. Extech brand products.Lab equipment & instruments. Made in china. Manufactured by COLE-PARMER. ...


Myron L PT1 MyronL ULTRAPEN Conductivity Tester - +/- 1%
Myron L PT1 MyronL ULTRAPEN Conductivity Tester - +/- 1%
In Stock
$153.48
$134.59
You Save: 12%

mpn: 0575405,

4.5 out of 5 stars with 16 reviews
This pen-style pocket Tester delivers accurate and reliable measurements of conductivity, TDS, and salinity. It's easy to use: simply press a button and dip the pen into the solution. The LCD gives you a quick measurement reading, alternating with tempera...


REED Instruments SD-9300 SD Series Environmental Meter, Datalogger (Air Velocity/Temp, Light, Ambient Temperature, Humidity)
REED Instruments SD-9300 SD Series Environmental Meter, Datalogger (Air Velocity/Temp, Light, Ambient Temperature, Humidity)
In Stock
$259.00
$239.90
You Save: 7%

mpn: SD-9300,

4.0 out of 5 stars with 32 reviews
This 7-in-1 environmental meter measures air velocity, air temperature, ambient temperature, relative humidity, light and contact temperature measurements. The SD-9300 is also capable of sound level measurements with the SL-417 adapter (optional). Us...


Apera Instruments AI480 DO850 Optical Dissolved Oxygen Meter Kit, with 10 Ft Optical DO Probe, Hassle-Free Testing Experience
Apera Instruments AI480 DO850 Optical Dissolved Oxygen Meter Kit, with 10 Ft Optical DO Probe, Hassle-Free Testing Experience
In Stock
$998.00
$898.75
You Save: 10%

mpn: AI480, ean: 0858718006513,

4.9 out of 5 stars with 58 reviews
Introducing Apera's all-new Optical Dissolved Oxygen Meter. Equipped with state-of-the-art optical DO probe, the DO850 meter generates quick and accurate dissolved oxygen readings in a hassle-free manner. No membrane or solution needed for the optica...


Oakton pH 5+ Handheld Meter with pH Probe
Oakton pH 5+ Handheld Meter with pH Probe
In Stock
$284.61
$254.70
You Save: 11%

mpn: WD-35613-52,

4.9 out of 5 stars with 14 reviews
Oakton WD-35613-52 pH 5+ Handheld Meter with pH ProbeReads pH and temperature. Automatic Temperature Compensation (ATC). All push button operation. Three-point pH calibration. Auto buffer recognition. ...


Testo 0560 0540 Pocket Pro Light Intensity Meter, +/- 3 Accuracy, 2 Type AAA Battery
Testo 0560 0540 Pocket Pro Light Intensity Meter, +/- 3 Accuracy, 2 Type AAA Battery
In Stock
$144.34
$128.40
You Save: 11%

mpn: 0560 0540, ean: 4029547008283,

4.5 out of 5 stars with 19 reviews
The sensor of the testo 540 is similar to the spectral sensitivity of your eye which makes it ideal for measuring actual light intensity. The 540 features a convenient hold function and displays max/min values on a large backlit display. It's a handy...


Orion AQUAfast Turbidity Meter Kit
Orion AQUAfast Turbidity Meter Kit
In Stock
$1,049.69
$284.58
You Save: 73%

mpn: AQ3010,

4.3 out of 5 stars with 34 reviews
Thermo Orion AQUAfast Turbidity Meter Kit. Turbidity meter is perfect for plant, field or lab, this simple, yet powerful turbidity meter offers impressive features. Autoranging from 0 to 1000 NTUs, the AQ3010 meter generates an accurate turbidity rea...


Digi-Sense Data Logging Light Meter with NIST Traceable Calibration
Digi-Sense Data Logging Light Meter with NIST Traceable Calibration
In Stock
$203.52
$189.00
You Save: 7%

mpn: AO-20250-00,

4.0 out of 5 stars with 49 reviews
What's included: USB cable, software CD, canvas carrying case, three AAA batteries, and nist-traceable calibration report with data supplied by in no cal. Ensure lighting standards and increase system efficiencies with precision measurement accuracy ...


Hanna Instruments Grochek LCD pHep 4 Waterproof PH Temperature Meter | HI98127
Hanna Instruments Grochek LCD pHep 4 Waterproof PH Temperature Meter | HI98127
In Stock
$149.99
$93.34
You Save: 38%

mpn: FBA_HI-98127, ean: 2050002771031,

4.6 out of 5 stars with 50 reviews
Hanna Instruments PH Tester. Made in Romania.pH Tester. Waterproof. pH -2.0 to 16.0 with +- 0.1 pH Accuracy. Automatic Shutoff and Temperature Compensation. Automatic Calibration. ...


Apera Instruments PH700 Benchtop Lab pH Meter, 0.01 pH Accuracy, 1-3 Points Auto Calibration, 3-in-1 pH/Temp. Electrode
Apera Instruments PH700 Benchtop Lab pH Meter, 0.01 pH Accuracy, 1-3 Points Auto Calibration, 3-in-1 pH/Temp. Electrode
In Stock
$294.00
$258.72
You Save: 12%

mpn: AI501, ean: 0858718006162,

4.2 out of 5 stars with 23 reviews
The Apera Instruments pH700 benchtop pH meter provides quick and stable pH readings for basic laboratory testing and educational purposes at an outstanding cost-effectiveness. Reliable measurement: with its quality 3-in-1 combination pH electrode and...


Kestrel 0830ORA 3000 Pocket Weather Meter/Heat Stress Monitor, 6.5' Height, 1.1' Wide, 1.9' Length
Kestrel 0830ORA 3000 Pocket Weather Meter/Heat Stress Monitor, 6.5' Height, 1.1' Wide, 1.9' Length
In Stock
$149.00

mpn: 0830ORA, ean: 0730650001842,

The Kestrel 3000 Pocket Weather and Heat Stress Meter detects environmental conditions and can provide crucial information for athletes, emergency response teams and construction professionals. Engineered for performance, the 3000 features a large LC...


Apera Instruments MP511 Benchtop pH Meter, Accuracy: ±0.01 pH, Range: -2.00-19.99 pH, with GLP data management & Software Support
Apera Instruments MP511 Benchtop pH Meter, Accuracy: ±0.01 pH, Range: -2.00-19.99 pH, with GLP data management & Software Support
In Stock
$450.50
$379.52
You Save: 16%

mpn: AI511, ean: 0858718006308,

4.0 out of 5 stars with 13 reviews
The Apera Instruments MP511 Benchtop pH Meter is simply the most cost-effective laboratory benchtop pH meter of the 4th generation, providing Accurate Measurement, Quick Response, and Consistent Result thanks to the advanced digital filtering technol...


Apera Instruments SX811-BS Portable Meat pH Meter, Equipped with LanSen Food-Grade Stainless Steel Anti-Contamination Blade Electrode
Apera Instruments SX811-BS Portable Meat pH Meter, Equipped with LanSen Food-Grade Stainless Steel Anti-Contamination Blade Electrode
In Stock
$560.00
$481.67
You Save: 14%

mpn: AI453, ean: 0858718006292,

4.8 out of 5 stars with 21 reviews
The Apera Instruments SX811-BS portable meat pH meter is a perfect combination of the most advanced digital processing technology, software design, and electrochemical sensor technology, specially designed for the pH measurement of meat, meat product...



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