1. A counter to count the quantity of objects in a single batch and the number of batches, and also can be used as length meter.2. Can be connected with encoder, length counting wheel, proximity switch, photoelectric switch, optical sensor, capacitive switch, etc.3. NPN and PNP sensor input switchable. 4 kinds of input mode, 6 kinds of output mode.4. Can set alarm value for relay output. Dual 4 digits LED Display.5. Widely applied in chemical, machine, light industry, etc.: Model: FH4-4CRNBApplication Range: Machine, light industry, electronic, food, package, leather, cloth weaving industry.Function: Counting, measuring length, automatic control alarm, automatic loop alarm, etc.Input: Pulse Signal: Square Wave and Sine Wave: 5less than equal Hless than equal 30V 0less than equal Lless than equal 2V up edge activeInput Impedance: greater than equal 10KohmCounting Speed: 30/5000CPSCounting Range: -1999-9999Preset Range: 0.001-9999Accuracy: +/-0.1%F.S Output: 1 Relay Contact Output Power Supply: 90-260V AC/DC Auxiliary Power: 24V DCEnvironment Temperature: 0-50CelsiusStorage Temperature: -10-60CelsiusEnvironment Humidity: 35-85%RHParameter Time: 10 yearsInsulation Resistance: greater than equal 10MohmPower Consumption: less than equal 5W Contact Edge: Up edge activeHole Size: 45 x 45mm / 1.77 x 1.77inchItem Weight: 106.1g / 3.74ozType: 4-digit CountersDIY Supplies: Electricalcolour:BlackMaterial:plasticsize:48 x 48 x80mm / 1.89 x 1.89 x 3.15inchPackage Contents:1 x Counter2 x Bracket1 x User Manual(English)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.