From outdoor and pet-friendly digital motion detectors to analogue motion detectors,
the Paradox series of motion detectors combines advanced features and patented
technologies to provide a high level of detection and false alarm prevention.
Whatever the application, there's a Paradox motion detector that will suit your
needs and surpass your expectations.
Developed for high-security applications, our digital motion detectors perform
direct analog to digital conversion of the PIR sensor's signal using a powerful,
high-speed microprocessor-based digital IC. A software-driven process then converts,
amplifies and processes the sensor's low-level signal in the digital domain without
any analog circuitry (no saturation, no loss of data and no noise). This unique
technology provides increased accuracy, reliability and superior false alarm
Our patented Auto Pulse Signal Processing transforms the signal energy to a pulse
output to determine if the progression of the detected occurrence corresponds to an
alarm condition. Energy from the signals are measured and stored in memory until a
minimum level is reached. The processor then rejects signals that do not meet its
required specifications for generating an alarm.
Completely software-driven, true 100% digital motion detection completely converts, amplifies and
processes the sensor’s low-level signal in the digital domain without any analog circuitry. The sensor’s
entire signal is processed without any saturation or noise, which provides increased accuracy, reliability
and superior false alarm immunity.
Conventional "Digital" Motion Detection:
Conventional "digital" motion detectors have an analog stage that is used to amplify
the sensor's signal. The analog circuitry causes most of the signal to be lost due to the
saturation of the amplifier. Therefore, there is no real benefit in adding a processor to an
analog motion detector since most of the signal is lost in the amplifier stage and there is
no data to process over a conventional analog decision-making circuit.
Digital Shield Algorithm
Shield is a software algorithm that is comprised of three major parts:
Real Time DSP (Digital Signal Processing):
The DSP portion of the software digitally amplifies and filters the sensor signal in real time. Unlike analog filtering, digital filters are
accurate, unaffected by temperature levels, have no phase distortion and do not add cost or hardware components. The result is a clean
and accurate digital signal with maximum S/N ratio. Movement Analysis:
Movement generates a unique sequence of signals. For each signal, Shield measures and calculates the signal’s parameters (amplitude,
duration, peak level, polarity, rise time and shape) in real time and then stores them in memory. Each signal is compared with a reference
bank of movement and non-movement signals. If the signal does not meet movement criteria, it is immediately rejected. RFI/EMI Protection:
The high dynamic range of the digital samples and high sampling rate allow high level RF signals to be recorded without clipping or any
other distortion. Shield recognizes RFI/EMI conditions and effectively distinguishes interference signals from movement signals without
compromising the detection of movement.
Auto Pulse Signal Processing (Patented)
Auto Pulse Signal Processing (APSP) measures energy from each detected signal and stores it in memory. To generate an alarm, the
memory must reach a required minimum level. Thus, in the presence of high-level signals (very low risk of false alarms) the detector
immediately generates an alarm, functioning as a “non-pulse count” detector, while low level signals (presenting a high risk of false
alarms) will cause the detector to automatically switch to a very high pulse count mode - resulting in excellent protection against false
alarms. Pulse counting rate depends on signal energy levels and can go much higher for RFI signals.
Automatic Temperature Compensation (ATC)
ATC automatically adjusts the motion detector’s sensitivity
according to the difference between the room temperature
and body temperature. This helps maintain the same
operation in its operational temperature range without any
loss of coverage or decrease in false alarm rejection.
Interlock Sensor Geometry (Patented)
The Interlock Sensor Geometry’s (ISG) interlaced pattern provides greater coverage
over longer distances more effectively than conventional sensors. Standard quad
detectors lose effectiveness as they reach their maximum coverage since a human
body will not cross both detector beams at the same time.
Dual Edge Processing (Entry and Exit Analysis)
Dual edge processing separates the entry and exit signals so each
signal must reach the required level. If the entry and exit signals do
not reach required energy levels, an alarm is not generated thus
dramatically increasing false alarm immunity. Single edge processing
(found in most PIRs) adds the entry and exit signals until the required
energy levels are reached before an alarm is generated.
Dual Opposed Detection (DOD)
Compares the entry and exit signals’ polarity. Only movement signals
will generate opposed polarity signals, which will be processed by the
software. Any interference signals will generate same polarity signals,
which will be rejected by the software providing unmatched RFI and