Import Em Card Readers — Buy in Bulk from Supplier in China

The EM Card readers from Rhombus Technology Co., Ltd are passive RFID devices designed to decode 125 kHz EM4100 format card serial numbers, outputting data via Wiegand 26-bit protocol. They operate on a 12V DC power supply and feature a compact, sealed housing suitable for indoor use in controlled environments. The reader’s antenna coil is tuned for optimal read range of 3 to 8 centimetres, depending on card orientation and material thickness.

These readers are constructed with a polycarbonate casing and a stainless steel mounting plate, offering resistance to dust and moderate humidity but not rated for outdoor exposure. The internal circuitry follows industry-standard EM4100 decoding, compatible with most Wiegand-enabled access control panels. While the listing does not specify IP rating, typical industrial EM readers in this class are rated IP54 or higher for indoor use in commercial buildings.

They are commonly deployed in corporate offices, university dormitories, and healthcare administrative zones where non-contact credentialing is preferred over biometrics. Buyers typically order in batches of 10 to 50 units for small to mid-sized facility upgrades. Trade terms are not listed, but standard packaging is bulk cartons of 10 units with anti-static foam inserts. Lead time and MOQ must be confirmed directly with the supplier.

Rhombus Technology Co., Ltd is a supplier based in Futian District, Shenzhen, China, with a registered address at No. 2 A500 Saige Science Park. The listing confirms it is an imported supplier with harbor trust tier, indicating verified export compliance and logistics readiness. There is no public information on company size, years in operation, or client roster. Response rate and average reply time are not available, suggesting limited or automated communication channels.

The company appears to focus on access control hardware, specifically EM and possibly Mifare readers, based on product scope. It does not claim manufacturing capability, certification ownership, or R&D activity. No claims about ISO, CE, or product testing are substantiated in the source data. Buyers should treat this as a sourcing intermediary unless direct verification confirms otherwise.