Description:
The PhidgetEncoder HighSpeed (1057, 1057_3B) connects to any typical two-bit optical encoder and can return up to 2,000,000 pulses (that is, 500,000 full quadrature cycles) per second. Specifically it reads a standard incremental non-differential TTL encoder.

The 1057 can be used to measure shaft speed or as a very accurate human input device. If you just need a simple human input device have a look at the 1052- PhidgetEncoder. The 1057 connects directly to a computer’s USB port. It comes with a  a Hardware mounting kit (4 nuts and bolts, 4 plastic spacers). USB cable and Encoder cables are NOT included; please order them also!

Specifications:

Version: 1057_3B   (we can still provide versions 1057_2B on special requests!)

Number of Encoder Inputs: 1
Count Rate Max: 2E+06 pulses/s
Encoder Interface Resolution: x4
Update Rate: 125 samples/s
Time Resolution: 1 ms
Encoder Input Low Voltage Max: 800 mV DC
Encoder Input High Voltage Min: 3.6 V DC
Encoder Pull-up Resistance: 2.2 kΩ
Current Consumption Board Max/Min: 100 mA / 20 mA
USB Voltage Min/Max: 4.8 V DC - 5.3 V DC

Resources:
More information to be found in the User Guide