Ammonia Test Strips for Industrial Coolants

Ammonia Test Strips for Industrial Coolants

Designed to detect ammonia levels ranging from 0.1 ppm to 0.25+ ppm in refrigerant solutions, these strips enable identification of NH3 contamination within secondary fluid loops. Using strips consistently in routine monitoring programs will provide additional protection needed to ensure a safe, efficient, ammonia-based cooling system. Conducting this simple dip-stick test of secondary fluid samples shows visually if there is ammonia leakage from the primary-coolant side of the system.

The test strip is constructed with a state-of-the-art, colored sensor, which changes from orange to green, blue, then purple with increasing levels of ammonia. These ammonia test strips are a cost-effective, simple, and efficient means to check and maintain cooling systems. Regularly testing with the strips ensures ammonia-based refrigeration systems are functioning properly giving your company an added layer of insurance against costly losses and downtime. Early detection of an ammonia leak is critical. Once a leak develops the entire cooling system is compromised and in jeopardy of further piping system erosion and degradation (ammonia is corrosive to non-ferrous metals).

Costly ramifications and risks of catastrophic breakdown can be prevented by early detection. There are also environmental concerns / regulatory consequences for ammonia discharge into the environment. Make the inexpensive investment of regularly testing your cooling system with Pacific Sentry’s industrial strength Ammonia Test Strips to reduce refrigeration system operating costs and risks.

Key Features
  • Direct measurement of NH3
  • Easy to use – simply immerse test strip in coolant solution then compare sensor color response to the NH3 color chart
    • No liquids to measure
  • Large test pad for easy readout – with a big pad measuring 1/2″ x 5/8″, these larger-than-industry test strips allow for easier color comparison
  • High sensitivity – visible color change at 0.1 ppm
  • Readout range incremented – 0.00, 0.1, 0.25, >0.25 ppm
  • Robust – specifically designed for industrial strength coolants
  • No reagents – just immerse in coolant solution and observe color change
  • 4 year shelf life – saves you money
  • No hazardous waste – avoid hazardous waste disposal costs

1. Insert test strip in solution to be tested, fully submerging test pad.

2. Allow test strip time to respond. * There is a concentration dependency – high NH3 can show a color response in a minute; lower concentrations take longer.

3. View/record response, which will progress from the baseline orange color, to green, to blue or purple with higher NH3 levels.

NOTES: Volume of solution does not matter; no fluid measurement is required.

Handling, Care, Use Life

DO NOT touch the pad at the end of the strip. Oils and residues from the hands and skin can contaminate the sensor and interfere with its response.

Reseal package between uses and when storing. Store at room temperature. Be aware some cleaning solutions, paints, epoxies, and cigarette smoke, contain ammonia or ammonia-related compounds. Exposing the test strips to such vapors or fumes should be avoided because, as expected, it will result in a color response by the sensor.

NH3 outgases from test samples over time. It is therefore wise practice to conduct testing soon after obtaining the sample solution. (If outgassing occurs, samples testing conducted at different times over extended periods can yield variable test results.)


Test Strip

  • Height: 3″
  • Width: 5/8″
  • Thickness: 1/32″

Test Pad

  • Height: 1/2″
  • Width: 5/8″
  • Thickness: ~9 mils

Low-level leaks may signal that a larger leak is developing, and long-term exposure at low levels can be just as damaging as major leaks. Many current detection systems are plagued by poorly functioning sensors and expensive false alarms – errors that can compromise your coolant system operation, increase operating costs, and escalate risks. Use of the sensor strip is a cost effective maintenance tool.

If the sensor color response indicates a high-level ammonia, 0.25 ppm NH3 or above, be aware that this is the upper end of its indicator range. The ammonia in solution may be of a higher concentration, possibly much higher, exceeding the strips limit so it cannot show that, however, the sample can be diluted and retested to determine the ammonia level if necessary.

These test strips have been tested for use with glycol-based coolants, fresh water, and salt water. Other coolants may be tested by the user, however, Pacific Sentry has not verified test strip efficacy in such coolants and assumes no responsibility as to accuracy or suitability of such testing.

Note that the pH of the test sample has a marked effect on the amount of testable ammonia in your fluid. The lower the pH, the more ammonia in the solution becomes ammonium ion, which the test strip does not register. To see how the measured NH3 in your sample relates to pH and the ammonium component, or the total ammonia in a sample, please follow this link for a conversion chart.

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Ordering Information

Buy your sensors online by clicking the “add to cart” button on the Products page or call (425)-229-9701 and talk directly to a representative to place an order. Custom fabrication requests are also welcomed; call or email for details. We will gladly work with you to design the best solution that meets your needs.

Shipping & Handling
in the United States

Products will be shipped within 2-4 business days. Ground shipping usually takes 3-5 days depending on shipping destination.

International Shipping
(Including Canada)

International shipping and handling depends on the specific country. Please email Customer Service at with your shipping address, product of interest and desired quantity. A shipping estimate will then be provided.

Our Return Policy

If you are not satisfied with our product for any reason, please return it within 14 days of receipt for full refund.

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