461950 Datasheet, PDF (2/6 Pages) Extech Instruments Corporation. – Panel Mount Digital Tachometer

Introduction
Congratulations on your purchase of the Extech 461950 Panel Tachometer. This meter
displays continuous readings from 5 to 99,990 rpm. Single pulse activation eliminates the
need for special gears when setting up the meter in any given application. Models 461955
(proximity sensor) and 461957 (photoelectric sensor) are also covered in this manual.
Careful use of these devices will provide years of reliable service.
Specifications
Model 461950 Panel Tachometer
Range
Resolution
Accuracy
Display
Display update rate
Power
Panel cutout dimensions
Bezel dimensions
Meter dimensions/Weight
5 to 99,990 RPM
0.1 (5 to 999.9); 1 (1000 to 9999); 10 (10.000 to 99,990)
0.05% + digit (of reading)
0.5 " (13mm) 4-digit (9999 count) LED display
Once per second
110/220VAC; 50/60Hz ±15%
3.62 x 1.77" (92 x 45mm)
3.78 x 1.89 x 2.36" (96 x 48 x 60mm)
3.61 x 1.66 x 3.54" (92 x 42 x 90mm); 13.9 oz. (397 g)
Model 461957 Photoelectric Sensor
Range
Power
Response time
Output
Photo beam color
Photo beam wavelength
Cable length
Up to 6000 RPM (100 Hz)
12 - 24VDC ±10%; Consumption: 40mA max.
< 1ms
NPN transistor; Max load 80mA
Green
5500 Angstroms
6 ft (1.8 meters)
Model 461955 Proximity Switch
Range
Power
Power Consumption
Object distance detection
Object size detection
Cable length
Up to 36,000 RPM (600 Hz)
12 – 24VDC ±10%
10mA max.
0.1" (3 mm) maximum target distance
0.07 x 0.11" (2 x 3 mm) minimum size detected
6 ft (1.8meters)
2
Model 461950 Version 2.0 March 2005