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DS1920-F5 8.90 €

Temperature iButton

The DS1920 Temperature iButton provides 9-bit temperature readings, which indicate the temperature of the device. Information is sent to/from the DS1920 over a 1-Wire interface. Power for reading, writing, and performing temperature conversions is derived from the data line itself. Because each DS1920 contains a unique silicon serial number, multiple DS1920s can exist on the same 1-Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings, equipment or machinery, and in process monitoring and control.

Special Features

Digital Thermometer Measures Temperatures from -55°C to +100°C in Typically 0.2s
Zero Standby Power
0.5°C Resolution, Digital Temperature Reading is Two's Complement of °C Value
Access to Internal Counters Allows Increased Resolution Through Interpolation
Reduces control, Address, Data, and Power to a Single Data Contact
8-Bit Device-Generated CRC for Data Integrity
8-Bit Family Code Specifies DS1920 Communications Requirements to Reader
Special Command Set Allows User to Skip ROM Section and Perform Temperature Measurements Simultaneously for All Devices on the Bus
2 Bytes of EEPROM to Be Used Either as Alarm Triggers or User Memory
Alarm Search Directly Indicates Which Device Senses Alarming Temperatures

Common iButton Features

Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are alike
Multidrop controller for MicroLAN
Digital identification and information by momentary contact
Chip-based data carrier compactly stores information
Data can be accessed while affixed to object
Economically communicates to host with a single digital signal at 16.3k bits per second
Standard 16 mm diameter and 1-Wire® protocol ensure compatibility with iButton® Device family
Button shape is self-aligning with cup-shaped probes
Durable stainless steel case engraved with registration number withstands harsh environments
Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim
Presence detector acknowledges when reader first applies voltage
Meets UL#913 (4th Edit.). Intrinsically Safe Apparatus: approved under Entity Concept for use in Class I, Division 1, Group A, B, C and D Locations