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The FPSI 1010 uses the latest miniaturisation techniques to produce a very compact voltage level indicator. The indicator provides a red-green-red bright LED indication over a 0 to 2.5V or 0 to 5V input voltage range. The user can easily set the colour switching thresholds (an optional programmer is available - FPSI 1010 PROG). Hysteresis is included to avoid chattering at the colour switching thresholds.