4 Digital Red LED Tachometer RPM Speed Meter + Hall Proximity Switch Sensor NPN

Description

Features 100% Brand New And High Quality Speed range: 99999 ~ 3.8 r / min Input Power: DC 8 ~ 24V Output Current: 20mA Margin of error: ± 0.5 ‰ ~ ± 1.5 ‰ r / min Display: 4 LED Sensor wiring: brown (Power+),blue(Power-),black(signal) Dimensions: 78 x 42 x 24mm Working temperature: -10 ~ 60 oC Magnet size: Φ5mm * 3mm Sensor probe diameter: Φ12mm Package Includes 1 x Tachometer 1 x Hall NPN proximity senso