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1-16 of 142 results for "ph pens"

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bluelab pH Pen-Digital pH Tester - Reliable & Accurate for High Yield Crops - Hand-Held Meter - Measures pH & Temperature ...

bluelab pH Pen-Digital pH Tester - Reliable & Accurate for High Yield Crops - Hand-Held Meter - Measures pH & Temperature in Solutions and Soil Solutions - Optimize Plant Health & Performance,White

4.4 out of 5 stars
4,389
300+ bought in past month
$109.99$109.99
FREE delivery Tue, Jan 9
More Buying Choices
$56.16(11 used & new offers)
CityFarmer PH Pen, Digital pH Meter, PH Meter for Water Hydroponics, with 2 Pack of Calibration Solution Mixture Included

CityFarmer PH Pen, Digital pH Meter, PH Meter for Water Hydroponics, with 2 Pack of Calibration Solution Mixture Included

3.8 out of 5 stars
437
$12.99$12.99
FREE delivery Wed, Jan 10 on $35 of items shipped by Amazon
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Apera Instruments AI101G GroStar Series GS1 pH Pen Tester Kit with Replaceable Double-Junction pH Probe for Hydroponics Wa...

Apera Instruments AI101G GroStar Series GS1 pH Pen Tester Kit with Replaceable Double-Junction pH Probe for Hydroponics Water Quality Testing, Gen II

4.5 out of 5 stars
103
$96.61$96.61
FREE delivery Wed, Jan 10
Or fastest delivery Mon, Jan 8
More Buying Choices
$95.39(3 new offers)
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Bluelab PENSTP pH and Conductivity Starter Pack - Precision Nutrient Solution Management Kit with Temperature Measurement,...

Bluelab PENSTP pH and Conductivity Starter Pack - Precision Nutrient Solution Management Kit with Temperature Measurement, Waterproof Pens, and Probe Care Kit

4.4 out of 5 stars
1,130
$179.25$179.25 ($89.63$89.63/Count)
FREE delivery Wed, Jan 10
Bluelab CAREKITPHCON Probe Care Kit for pH and Conductivity (TDS) Probes and Pens with 4 Solutions and Cleaners, Cleaning ...

Bluelab CAREKITPHCON Probe Care Kit for pH and Conductivity (TDS) Probes and Pens with 4 Solutions and Cleaners, Cleaning Kit Tool for Hydroponic system and Indoor Plant Grow

4.6 out of 5 stars
1,071
50+ bought in past month
$31.00$31.00
List: $34.95$34.95
FREE delivery Wed, Jan 10 on $35 of items shipped by Amazon
More Buying Choices
$27.00(3 new offers)
Bluelab PENSOILPH Soil pH Pen, Digital Meter and Water Test Kit, Also Used for Coco and Rockwool with Easy Calibration for...

Bluelab PENSOILPH Soil pH Pen, Digital Meter and Water Test Kit, Also Used for Coco and Rockwool with Easy Calibration for Hydroponic System and Indoor Plant Grow, Clear

4.2 out of 5 stars
929
50+ bought in past month
$160.00$160.00
FREE delivery Wed, Jan 10
3 Pack Hydrion P-12m Insta- Chek 0-13 Range Mechanical Ph Pencils - Pens for Surface Testing

3 Pack Hydrion P-12m Insta- Chek 0-13 Range Mechanical Ph Pencils - Pens for Surface Testing

4.3 out of 5 stars
58
$41.99$41.99 ($14.00$14.00/Test Strip)
FREE delivery Jan 12 - 16
APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

4.5 out of 5 stars
8,325
900+ bought in past month
$49.89$49.89
List: $66.00$66.00
FREE delivery Wed, Jan 10
More Buying Choices
$44.96(3 used & new offers)
Best Sellerin Lab pH Meters
PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Hou...

PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium

4.0 out of 5 stars
9,251
3K+ bought in past month
$9.99$9.99
List: $11.99$11.99
FREE delivery Wed, Jan 10 on $35 of items shipped by Amazon
VIVOSUN Digital PH Meter for Water, 0.01ph High Accuracy Pen Type PH Tester for Hydroponics, Household Drinking, Pool and ...

VIVOSUN Digital PH Meter for Water, 0.01ph High Accuracy Pen Type PH Tester for Hydroponics, Household Drinking, Pool and Aquarium

3.9 out of 5 stars
6,861
2K+ bought in past month
$9.95$9.95
List: $13.99$13.99
FREE delivery Wed, Jan 10 on $35 of items shipped by Amazon
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HAYI PH Meter for Water, PH Tester 0.01High Accuracy Water Quality Tester with 0-14 PH Measurement Range, PH Meter for Hou...

HAYI PH Meter for Water, PH Tester 0.01High Accuracy Water Quality Tester with 0-14 PH Measurement Range, PH Meter for Household Drinking, Pool, Aquarium, Aquaculture, Lab, Beer Brewing & Wine

4.8 out of 5 stars
1,229
400+ bought in past month
$10.99$10.99
Typical: $12.99$12.99
Save 5% on 3 select item(s)
FREE delivery Wed, Jan 10 on $35 of items shipped by Amazon
PmoYoKo Digital pH/TDS Meter with ATC pH Tester, 3 in 1 pH TDS Temp 0.01 Resolution High Accuracy pH Tester with LCD Backl...

PmoYoKo Digital pH/TDS Meter with ATC pH Tester, 3 in 1 pH TDS Temp 0.01 Resolution High Accuracy pH Tester with LCD Backlit, TDS Meter pH Meter for Water, Wine, Pool, Hydroponics and Aquariums

4.3 out of 5 stars
1,869
700+ bought in past month
$29.99$29.99
5% coupon applied at checkoutSave 5% with coupon
FREE delivery Tue, Jan 9 on $35 of items shipped by Amazon
VIVOSUN PH Meter Digital PH Tester Pen 0.01 High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Hydropon...

VIVOSUN PH Meter Digital PH Tester Pen 0.01 High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Hydroponics, Household Drinking, Pool and Aquarium, with ATC, Orange

4.0 out of 5 stars
1,247
50+ bought in past month
$13.99$13.99 ($12.72$12.72/100 g)
FREE delivery Wed, Jan 10 on $35 of items shipped by Amazon
Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy, Lcd dis...

Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy, Lcd display

4.5 out of 5 stars
3,000
400+ bought in past month
$79.85$79.85
List: $105.00$105.00
FREE delivery Jan 9 - 12
Or fastest delivery Fri, Jan 5
More Buying Choices
$76.86(6 used & new offers)
VIVOSUN pH and TDS Meter Combo, 0.01ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Met...

VIVOSUN pH and TDS Meter Combo, 0.01ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified

4.1 out of 5 stars
21,308
3K+ bought in past month
$15.99$15.99
FREE delivery Wed, Jan 10 on $35 of items shipped by Amazon
More Buying Choices
$15.83(2 used & new offers)
General Hydroponics pH Control Kit for a Balanced Nutrient Solution

General Hydroponics pH Control Kit for a Balanced Nutrient Solution

4.7 out of 5 stars
26,647
3K+ bought in past month
$3.89$3.89-$27.99$27.99
FREE Shipping on eligible orders
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