The SI-20 sets a new standard in aesthetics and functionality.  The architectural design of the SI-20 was achieved through the input of industry professionals, as well as a multitude of end users.  It’s copyrighted design has been described as “Simple Elegance”.  The SI-20 quietly blends in to its surroundings and is as comfortable on the boardroom wall as it is in a classroom.  Rave reviews have also been received by custom homeowners and designers.  Architects and designers can now work in harmony with engineers and contractors.  The aesthetic integrity of a building no longer has to be compromised to deliver optimum comfort and performance.


EC160 & SC160 compatible: 2-wire SI-20 Communication Bus
Maximum Distance: 500 feet
Protection Circuitry: Reverse Polarity Protected
Communication Jack: 2.5mm (optional)

Operating Temperature: 0 °C to +50 °C, 32 °F to 122 °F
Storage Temperature: -20 °C to +70 °C, -4 °F to 158 °F
Relative Humidity: 5% to 95% (non-condensing)

On-Board Temperature Sensor
Temperature Sensor: Precision Thermistor, 10K Type II
Accuracy: ±0.2 °C, ±.36F (0 to 50 °C)

Upper Line: 8 Character Alpha-Numeric
Lower Line: 4 Digit LCD Display
Push Buttons: 4 Fully Programmable for User Functionality
Dimensions: L 5.14” x W 3.13” x H 1.04”, (130.6 x 79.5 x 26.4 mm)
Material: ABS, UL 94-VO rated

Period: 2 Years (Limited)


SI-20 Datasheet Data Sheet
SI-20 Datasheet


SI-20-S-B  —  Standard Model
SI-20-S-C — Standard Model with Communication Jack