Pir-D204B

Anti-Jamming Dual Element Pyroelectric Infrared Radial Sensor

The pyroelectric infrared sensor detects infrared radiation on the basis of the characteristics that the polarization of pyroelectric material changes with temperature. Dual compensated sensing elements are applied to suppress the interference resulting from temperature variation with the EMI components. As a result, the operating stability of the sensor is greatly improved. Our products can be used world wide for many applications. Such as in security systems, burglar alarms, visitor acknowledgement, light switch control and intellectualized toy, etc.

Standard Specifications and Dimensions

Recommended Model	D204B big window
Encapsulation Type	TO-5
IR Receiving Electrode	2*1mm,2 elements
Window Size	5*3.8mm
Spectral Response	5—14µm
Transmittance	≥75%
Output Signal[Vp-p]	≥3500mV
Sensitivity	≥3300V/W
Detectivity (D*)	1.4 ×108 cmHz1/2/W
Noise[Vp-p]	<70mV
Output Balance	<10%
Offset Voltage	0.3~1.2V
Supply Voltage	3—15V
Operating Temp	-30—70ºC
Storage Temp	-40—80ºC
Field of View
Equivalent Circuit

Test Method

Measurement conditions

• Circumstance situation temperature 25ºC
• Black-body temperature 420K (@147˚C)
• Chopping frequency1 Hz, 0.3～3.5Hz △f,
• 72.5 dB Amplifier

The sensitivity balance of dual elements sensor is calculated by measuring the sensitivity (signal output voltage) of each element and uses the formula as below:
Balance = |VA-VB|/(VA+VB) ×100%
VA = Sensitivity of side A ( mVp-p)
VB = Sensitivity of side B ( mVp-p)

Typical Application

Notice:
U1A-D:LM324
Vdd:12V DC
Rs=47KΩ Ω@ on an offset voltage

Spectral Response of Window Materials

Notice:
The typical average transmition curve of5μm pass IR filter is figured, which is vacuumed on silicon filter.

Fresnel Lens for Human Body Detection

Directions for Use

• Pay attention to the mounting direction of the sensor’s element and the parts size in the ichnography. You can get a optimal optical design according to the focus of the Fresnel Lens.
• The sensor parameter testing is operated in the condition of the standard Black Body and the interrelated circuit after one minute steadying-time.
• The sensor detecting distance is a multidimensional function, which consists of ambient temperature ,moving target temperature, Fresnel Lens’ ’target distance, environment humidity , amplifier gain and comparison voltage.
• It is recommended that the welding length of the sensor’s down-lead should not be less than 4mm ,and the soldering time is as short as possible.
• Do not touch the window by hand and the hard things.
• Strong shake and electrostatics should be avoided.
• This product is packed with the environmental protection material, and the sensor’s surface have been covered specially with the OHK anticorit material. Small package have 100PCS, and big package 3000PCS.