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Air circuits are checked by eye and by ear far more often than by gauge, because adding a gauge means adding a tee, a cable and a place to mount it. A battery sensor on the circuit and a phone as the display removes all three.

Where this fits, and where it does not

Our standard sensor covers 0–500 kPa gauge (0–600 kPa absolute), about 5 bar. That is the right range for light air circuits, low-pressure bellows and seat or cab air. It is not the range for a heavy-truck air suspension running at 8–12 bar, and we say that in the first reply rather than shipping a part that reads saturated.

• Light air circuits and low-pressure bellows — inside the standard range.
• Heavy vehicle suspension at 8–12 bar — above the standard part; a different sensor has to be specified.

What it gives you

• 2.4 GHz Bluetooth — no receiver: the phone is the reader. Nothing to mount, wire or power.
• 0–500 kPa gauge, ±2 kPa — finer than the drift you are chasing.
• Replaceable CR1632, about 1.5 years, no re-pairing after the change.
• IP67, Ø21 × 16 mm — a normal service task again.

What it does not do

Without a receiver there is no continuous monitoring and no in-cab alarm: nothing is watching while nobody checks. If the circuit must alarm in the controller, the receiver configuration (UART or CAN) is the answer, and we build it to order.

Three questions we need answered

1. Working pressure of the circuit — decides whether the standard part applies.
2. Where the measuring point sits: a tee, a port, or the valve of the bellows.
3. Continuous reading or a periodic check — decides receiver or no receiver.

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