What indicates that the battery is running low in the digital in-line pressure gauge?

The indication that a battery is running low in a digital in-line pressure gauge is typically represented by the flashing "LO batt" message. This is a standard feature in many electronic devices designed to alert the user that battery power is dwindling and that a replacement or recharge may be necessary soon. This preventative notification helps ensure that the device remains functional and accurate when in use, especially in critical situations such as firefighting or other emergency response scenarios.

Other indications, such as a red light activation or continuous beeping, might signal different operational or functional alerts rather than directly indicating battery status. Additionally, a drop in the digital number display could result from various issues unrelated to battery life, such as calibration errors or equipment malfunction. Hence, the flashing "LO batt" message is the most reliable and straightforward signal that the gauge requires attention regarding its battery.