uniquegoods LED 4 Digital Tachometer RPM Gauge Speed Meter Tester 10-9999 RPM with Hall Proximity Sensor Switch, Blue

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About Uniquegoods LED 4 Digital Tachometer RPM Gauge

Specification: 1.The digital panel meter uses the newest A/D converter chip and the highly stable reference IC. 2.The circuit design is reasonable, the appearance adopts the standard size, the installation is convenient. Parameters: 1.Measuring Accuracy: ¡À0.1, reading ¡À1 word 2.Measure range: 10-9999RPM 3.4-digit blue 0.56 LED display 4.Display Refresh Rate: > 3 times per second 5.Dimensions: 3.11*1.65*1.26in 6.Weight: 0.11LB 7.Over range indication: first digit displays "1" or "-1", the last three digits do not show this sign. 8.Sensor wiring: brown-(1)Power+; blue-(3)power-; black-(5)signal in. Precautions: 1.Connect the plug correctly as the product label wiring diagram. 2.Strong electromagnetic interference should be avoided. It is best to use shielded wire or twisted pair wire for measuring wire. 3.The counter's count signal and zero-clearing signal input switch or circuit should be as close as possible to the counter's wiring terminal so that the signal line is as short as possible. 4.Avoid collimation or strangulation with other lines, such as power or power wires, to avoid unnecessary interference, if need be, use a shielded wire, the shield layer is attached to the counting terminal "+". 5.BETTER NOT use the mechanical switch or micro switch, for their lives are shorter and easier to make mistake after long time; if users must use them, please choose the quality ones to avoid mistakes. Magnetic control switch is strongly recommended. Package included: 1x Digital Tachometer Blue 1x Hall proximity sensor 1x Wire 1x Magnet