Narrow range pH strip tailored to the pH range applicable to brewing. pH strips are a convenient way to check/monitor pH without the cost or maintenance hassle of a full meter.
Vial of 100 strips with waterproof color chart.
Remove one Beer pH test strip from the vial.
Dip the test pad into the solution being tested for 1-2 seconds.
Remove the strip, and compare against the color chart within 10-15 seconds. Do not let the pad dry before reading against the color chart.