Temperature Indicator Sign: IceAlert™ Indicator Sign

This circular dial sign indicates the potential for icy conditions by changing from reflective silver to reflective blue. This temperature detecting sign reports the temperature by automatically beginning to change color at 36 °F (2 °C) and becoming fully bright blue at 32 °F (0 °C). When the temperature rises, the sign will automatically return to silver. It is encased in a clear-faced plastic case with holes for wall or post mounting (tamper-proof fasteners included). This self-contained sign does not require batteries or any electronics. 

Sign is available in two sizes, 6" diameter and 9" diameter (15.2 or 22.9 cm).