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Sensor vs Switch Readings: Why Your Gauge Might Not Update in Real-Time

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Have you noticed that a gauge on your ScanGauge unit doesn’t update continuously but instead flicks between two values? You’re not alone! This is a common question we receive from customers, and the answer lies in understanding sensor vs switch readings.

What’s the Difference Between Sensor and Switch Readings?

Sensor Readings: Continuous, Real-Time Data

Sensor readings provide continuous, real-time data that fluctuates over a range of values. These readings help the vehicle’s onboard computer make constant adjustments for optimal performance.

Switch Readings: Binary On/Off Signals

Switch readings, on the other hand, function as binary status indicators—essentially an on/off switch. They come from vehicle components like solenoids, relays, or pressure switches that either open or close a circuit. 

Why Does My ScanGauge Only Show Two Values?

If your gauge isn’t updating in real-time but instead flips between two values, it’s likely pulling data from a switch rather than a sensor. This is normal behavior, as switches only report whether a system is activated or deactivated at any given time.

Final Thoughts

Understanding the difference between sensor and switch readings can help you better interpret your ScanGauge’s data and troubleshoot any concerns. If you need further assistance, feel free to contact us