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pH Testing

One of the most common water tests, pH is a measure of the acidity or basicity of the water. The pH scale is logarithmic, and runs from 0 to 14. 7.0 is considered neutral, with values less than 7 being acidic and those above 7 basic. The greatest concern with pH is how it affects the toxicity of many other substances, including nitrite and ammonia.

LaMotte pH Octet Comparator Test Kits
Each test kit consists of an Octet Comparator, graduated test tubes, and a bottle of indicator solution for 50 tests. LaMotte Company has been supplying  laboratory quality pH indicator tests to professional analysts for more than eighty years; these are the most reliable, economical pH test kits available.  Simply fill the tube to the mark with the sample water, add several drops of indicator, and compare the resulting color against the eight permanent color standards in the comparator.
How to Select the Right pH Kit:      Single or Wide Range?
Single range kits cover a range of 1.4 pH units in 0.2 unit increments (0.1  unit sensitivity). Wide range kits may cover as many as 7 pH units in increments of 0.5 or 1.0 pH units (0.25 or 0.5 unit sensitivity).
Which Range?
Choose a kit in which the midpoint of the range covered is as close to the average or optimum pH value of the sample water. If this value is unknown, choose a wide range kit.
Indicators specific to a particular pH range allow colorimetric determination  of pH. If the water to be tested is cloudy, one may wish to employ the bicolor  reader.

Octet Comparator Kits

The Octet Comparator contains eight color standards with built-in filters which eliminate optical distortion. The color standards are arranged so that the sample can be compared to four standards at once.

LC Order №

pH Indicator

Octet Comparator Color Standard Values in pH Units

Hazard (Shipping Weight/lbs)

PRICE

2107/P-BCP

Bromcresol Purple

5.2

5.4

5.6

5.8

6.0

6.2

6.4

6.6

NH (1)

$35.00

QTY:

2108/P-CPR

Chlorophenol Red

5.4

5.6

5.8

6.0

6.2

6.4

6.6

6.8

NH (1)

$35.00

QTY:

2109/P-BTB

Bromthymol Blue

6.0

6.2

6.4

6.6

6.8

7.0

7.2

7.4

NH (1)

$35.00

QTY:

2110/P-PR

Phenol Red

6.8

7.0

7.2

7.4

7.6

7.8

8.0

8.2

NH (1)

$35.00

QTY:

2111/P-CR

Cresol Red

7.2

7.4

7.6

7.8

8.0

8.2

8.4

8.6

NH (1)

$35.00

QTY:

2112/P-TB

Thymol Blue

8.0

8.2

8.4

8.6

8.8

9.0

9.2

9.4

NH (1)

$35.00

QTY:

2113/P-ORB

Oleo Red B

8.6

8.8

9.0

9.2

9.4

9.6

9.8

10.0

N (1)

$35.00

QTY:

2114/P-LP

LaMotte Purple

9.8

10.0

10.2

10.4

10.6

10.8

11.0

11.2

NH (1)

$35.00

QTY:

2117/P-3100

Wide Range

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

N (1)

$35.00

QTY:

2118/P-3065

Wide Range

3.0

3.5

4.0

4.5

5.0

5.5

6.0

6.5

N (1)

$35.00

QTY:

2119/P-5085

Wide Range

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

N (1)

$35.00

QTY:

2120/P-5100

Wide Range

5.0

6.0

6.5

7.0

7.5

8.0

9.0

10.0

N (1)

$35.00

QTY:

2121/P-7105

Wide Range

7.0

7.5

8.0

8.5

9.0

9.5

10.0

10.5

N (1)

$35.00

QTY:

2123/P-1080

Acid Wide Range

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

N (1)

$35.00

QTY:

2124/P-8512

Alkaline Wide Range

8.5

9.0

9.5

10.0

10.5

11.0

11.5

12.0

N (1)

$35.00

QTY:

5858

Wide Range

2 Octet comparators - combines Code 2118 and Code 2121 from above

N (1)

$56.95

QTY:

Replacement pH Reagents for above kits Comparator Kits

All of the following Reagents are 30 mL Bottles

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KIT #

Reagent #

Description

PRICE

2081-01

2218-G

Wide Range

$5.55

QTY:

2212-G

Cresol Red

$5.35

QTY:

2107

2208-G

Bromcresol Purple

$5.45

QTY:

2108

2209-G

Chlorophenol Red

$5.10

QTY:

2109

2210-G

Bromthymol Blue

$5.25

QTY:

2110

2211-G

Phenol Red

$5.10

QTY:

2111

2212-G

Cresol Red

$5.35

QTY:

2112

2213-G

Thymol Blue

$5.35

QTY:

2214-G

Oleo Red B

$8.40

QTY:

2114

2215-G

LaMotte Purple

$5.50

QTY:

2117

2218-G

Wide Range

$5.55

QTY:

2118

2218-G

Wide Range

$5.55

QTY:

2119

2218-G

Wide Range

$5.55

QTY:

2120

2218-G

Wide Range

$5.55

QTY:

2121

2218-G

Wide Range

$5.55

QTY:

2123

2302-G

Acid Wide Range

$6.50

QTY:

2124

2303-G

Alkaline Wide Range

$5.50

QTY:

All Replacement Reagents are priced using a 30 mL Size. Larger sizes are available.
Click HERE for larger bottle sizes available.

pH PLUS Direct Digital pH Meter™

The pH PLUS DIRECT uses a microprocessor to put laboratory precision into a portable water-resistant design. Read pH, mV, temperature and concentration with accuracy. The pH PLUS DIRECT allows the analyst to use ISEs to read concentration in ppm. Memory for 25 test results. The microprocessor makes the unit easy to use in any test mode.

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Specifications

pH:

Range:

0.00 to 14.00

Resolution:

0.01

Accuracy:

±0.002

Slope:

80 to 120%

Calibration:

3 point manual or automatic

Electrode:

Epoxy, Ag/AgCl

Temperature:

Range:

0.00 to 100.0°C

Resolution:

0.1°C

Accuracy:

±1°C

Concentration:

Range:

0.0000 to 19999

Resolution:

±0.1 LSD

Accuracy:

±0.5% or ±1 LSD

mV:

Range:

±1999.9

Accuracy:

±0.1 mV

Resolution:

0.1 mV

Inputs:

1 BNC, Temp probe, power, ref.

Power:

9V alkaline or line for 110 or 220V

Description

LC №

PRICE

pH Plus Direct Meter with pH and Temperature probes, , liquid buffers (4, 7, & 10) 120 mL size bottles, complete operating and technical manual with sturdy field case.

LCL-1936

$ 597.00

QTY:

Replacement PARTS, pH Solutions, Tablets, Other recommended Items , and helpful technical information for the above pH Plus Meter are available on our web site. CLICK HERE

Ion Specific Electrodes

Description

LC Order №

PRICE

Ammonia

5-0043

$310.80

QTY:

Fluoride

5-0048

$326.35

QTY: