General
The KD-2446 is a non-contact proximity measuring system. This low-cost, easy-to-use system makes precision static and dynamic measurements of metal targets.
More Features
- Outstanding precision: static resolution to 12 microinches (approx. 0.3 µm)
- Low cost
- Excellent performance with ferrous targets
- Compact rugged electronics, sensors
- Adjustable gain for up to 22 V output (with 24 VDC input)
- High speed level adjustable switched output for process control
- Temperature tolerant sensors (to 204 °C)
- Very low switching hysteresis, <1 % on ferrous targets
- RoHS compliant
Theory of Operation
The KD-2446 system operates on a traditional Colpitts oscillator circuit where the sensor acts as the resonating coil for the oscillator. The proximity of the target to the sensor face pulls the oscillator, changing its frequency and amplitude of modulation, and controlling a variable gain oscillator section within the electronic circuit. The signal is half-wave rectified and filtered to obtain an analog voltage proportional to the target position or displacement. The analog voltage output can be varied by adjustment of the gain. The input power is diode protected and regulated to provide a clean low-noise signal. The output is short-circuit current protected.
Application
The KD-2446 may be used in a variety of applications using target materials such as ferrous, stainless steel or aluminum. Applications include displacement, vibration, sorting and event capture. With its excellent sensitivity to small targets and high-speed switching, the KD-2446 is ideal for RPM sending in harsh environments. The opto-isolated switched output makes the KD-2446 ideal for interfacing to PLC inputs, counters, timers or alarm circuits.
KD-2446 System
The KD-2446 system consists of two sub-assemblies: the sensor, with integral cable, and the signal conditioning or electronics module. The KD-2446 electronics is housed in a DIN rail mount enclosure with terminal connections for +12 VDC to +24 VDC input power and the variable voltage and switched outputs. Power supplies are available optional. The system comes standard with one of two production sensor configurations the 9C or the 5CM. Both of these sensors are rated for continuous operation up to 400 °F (204 °C).
In addition to the standard sensors a series of sensors with a diameter from 2 to 51 mm is available!
EMC Performance
The KD-2446 conforms with the applicable standards of Council Directive for Generic for Light Industrial and Commercial Use. Under some EMI environments, at specific frequencies, the KD-2446 unit may experience a change in output voltage. In general, when exposed to those environments covered by the EMC directive, the user can expect less than 5 % deviation of output. As always, contact us for specific data.
