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Photoconductive cells

Click to the picture for a detailPhotoconductive cells are semiconductor elements changing their resistance value in dependence on the lighting conditions. TESLA BLATNÁ,a.s. manufactures photoconductive cells series with spectral sensitivity in range 530 - 720 nm (typical values of disipation power from 125 to 500 mW and values of operation voltage from 150 to 1 500V) and with different type of encapsulation - in glass capsule (type G09), single round ceramic plate (types K11, K25), metal case (type M08), ceramic plate in plastic case (types P13, P28) and single rectangular ceramic plate (type S44). The used photosensitive materials enable changing wavelenght for maximum sensitivity in range 540-730 nm (for short in type marking as 53, 56, 60, 65, 72). The resistance dependence on light is determined by the table resistance value at light 10 lx (in type marking as the middle of the tolerance range of the resistance value - f.e. as 10, 15, 20, 40).
Examples of parameters for various photoresistors types
(detailed information about complete photoconductive cells range is available in downloadable catalogue lists)
Type Vmax Pmax λsmax R10lx Rmin
G0972 50 100 100 720 10...85 5
K0760 20 200 125 600 13...27 2
KD0753 20 100 50 530 13...27 1
K1172 10 250 250 720 5...15 10
K2553 15 1500 500 530 10...20 0.6
M0856 10 150 125 560 6.5 ... 13.5 0.5
M0872 40 250 125 720 26...53 12
P1353 40 320 250 530 26...53 1
P2853 20 1500 500 530 13...27 0.8
S4456 10 150 50 560 6.5 ... 13.5 1

Description

Vmax - maximum operation voltage (max. value at darkening)
Pmax - maximum power disipation (at 25 °C)
λsmax - wavelength for maximum sensitivity
R10lx - resistance at light intensity 10 lx and colour temperature 2856 °K
Rmin - dark resistance (indicates the minimum resistance value given 5 sec. After breaking illumination 10 lx)
Click to the picture for a detail
Photoconductive cell K25
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Optocouplers with photoresistor

Click to the picture for a detailOptocouplers with photoresistor consist of light tight packaged light source (usually LED) and photoresistor. Through control of the input current or voltage applied to the optocoupler, the output resistance can be varied. The output resistance follows the input signal in analog manner. A small change in input signal can cause a large change in output resistance. The optocouplers with photoresistor have been found to provide a very economic and technically superior solution for many applications. Low distorsion characteristics namely at low voltages makes the optocouplers suitable for use in a number of applications, especially in audio circuits where they are used mostly for limiting, switching and gating and at the circuits with temperature dependent elements also for higher amplitude signals.
Examples of parameters for optocouplers with photoresistors
(detailed information is available in downloadable catalogue lists)
Type UIO (kV~) RIO (Ω) CIO (pF) Clim. Category
 Weight (g)
3WK 163 10 > 0.5 > 108 < 1.5 40/ 70/ 04 0.9
3WK 163 40 > 2.5 > 1010 < 0.5 40/ 70/ 04 1.5
3WK 163 41 > 2.5 > 1010 < 0.5 40/ 70/ 04 1.5
3WK 163 43 > 2.5 > 1010 < 0.5 40/ 70/ 04 1.5
3WK 163 44 > 2.5 > 1010 < 0.5 40/ 70/ 04 1.5

Description

UIO - isolation voltage input/output
RIO - isolation resistance
CIO - capacity input-output
Click to the picture for a detail
Optocoupler with photoresistor 3WK 163xx
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PDF catalogues

You can download electronic catalogs in Excel and PDF format.
File File description

    optocoupler-optron.pdf (172 kB)
 File contains detailed parameters for optocouplers with photoresistors, including examples of applications.
 

    opticky-spinac-optoswitch.pdf (1425 kB)
 File contains detailed data for optoswitch, which is used for detection of motion and movement.
 

    fotorezistory-2009-photoconductive-cells.pdf (671 kB)
 File contains summary of photoconductive cells.
 
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