{"id":1810,"date":"2026-03-25T06:38:33","date_gmt":"2026-03-25T06:38:33","guid":{"rendered":"https:\/\/steamstoreke.com\/?post_type=product&p=1810"},"modified":"2026-03-25T06:38:33","modified_gmt":"2026-03-25T06:38:33","slug":"20528-20mm-ldr-mini-photoresistor","status":"publish","type":"product","link":"https:\/\/steamstoreke.com\/index.php\/product\/20528-20mm-ldr-mini-photoresistor\/","title":{"rendered":"20528 20mm LDR Mini Photoresistor"},"content":{"rendered":"

The resistance of 20mm GL20528 Light Sensitive Photoresistor LDR changes with the change in the ambient light exposed on the surface of the sensor. As the light on the sensor increases then the resistance across the two leads decreases. Light Dependent Resistor is a type of\u00a0photocell<\/strong>\u00a0which finds excellent use in light sensing device application, whether it is automatic outdoor light ON\/OFF switch or indoor automatic light switch; moreover, the 12mm LDR or\u00a0photoresistor<\/strong>\u00a0sensor works best in both light and dark regions. The photo-resistor is a staple of electronics. If you need a way to sense the level of ambient light, then there is no easier way to do it without an LDR\/photo-resistor.<\/p>\n

Two Cadmium Sulphide PhotoConductive Cells with spectral responses similar to that of the human eye. Cell resistance falls with increasing light intensity. Applications of this product include smoke detection, automatic lighting control, batch counting, and burglar alarm systems. Furthermore, some of the applications are given below.<\/p>\n

\u00a0Analog Applications:<\/strong><\/p>\n

\n
    \n
  1. Camera exposure control<\/li>\n
  2. Auto slide focus \u2013 dual cell<\/li>\n
  3. Photocopy machines \u2013 the density of the toner<\/li>\n
  4. Colorimetric test equipment<\/li>\n
  5. Densitometer<\/li>\n
  6. Electronics scales \u2013 dual cell<\/li>\n
  7. Automatic gain control \u2013 modulated light source<\/li>\n
  8. Automated rear view mirror<\/li>\n<\/ol>\n

    Digital Applications:<\/strong><\/p>\n<\/div>\n

    \n
      \n
    1. Automatic headlight dimmer<\/li>\n
    2. Nightlight control<\/li>\n
    3. Oil burner flame out<\/li>\n
    4. Streetlight control<\/li>\n
    5. Absence\/presence (beam breaker)<\/li>\n
    6. Position sensor<\/li>\n<\/ol>\n

      Other applications:<\/strong><\/p>\n

        \n
      1. Annunciator<\/li>\n
      2. Camera automatic photometry<\/li>\n
      3. Electronic toy<\/li>\n
      4. Industrial control<\/li>\n
      5. Light control<\/li>\n
      6. Light control lamp<\/li>\n
      7. Photoelectric control<\/li>\n
      8. Switch<\/li>\n<\/ol>\n

        Features:<\/strong><\/h4>\n
          \n
        1. Coated with epoxy<\/li>\n
        2. Good reliability<\/li>\n
        3. High sensitivity<\/li>\n
        4. Small volume<\/li>\n
        5. Fast response<\/li>\n
        6. Good spectrum characteristic<\/li>\n
        7. Model: GL20528 ( GM20528 )<\/li>\n
        8. Size: 20mm<\/li>\n
        9. Max. voltage: 500 VDC<\/li>\n
        10. Max. power: 500 mW<\/li>\n
        11. Spectrum Peak Value (nm): 560<\/li>\n
        12. Light resistance ( K\u03a9) : 10\u201320 k\u2126<\/li>\n
        13. Dark resistance ( K\u03a9): 2 k\u2126.<\/li>\n
        14. \u03a5 value : 0.6.<\/li>\n
        15. Increase response time: 30 mS.<\/li>\n
        16. Decrease response time: 30 mS.<\/li>\n<\/ol>\n
          \n

          Package Includes :<\/strong><\/h4>\n
          1 x 20mm GL20528 Light Sensitive Photoresistor LDR.<\/div>\n
          <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

          The resistance of 20mm GL20528 Light Sensitive Photoresistor LDR changes with the change in the ambient light exposed on the surface of the sensor. As the light on the sensor<\/p>\n","protected":false},"featured_media":1811,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[15],"product_tag":[],"class_list":{"0":"post-1810","1":"product","2":"type-product","3":"status-publish","6":"product_cat-uncategorized","8":"first","9":"instock","10":"shipping-taxable","11":"purchasable","12":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/product\/1810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/comments?post=1810"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/media\/1811"}],"wp:attachment":[{"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/media?parent=1810"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=1810"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=1810"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/steamstoreke.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=1810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}