Add to Cart Siemens 540-538 Siemens MSRP: Now: $57.04 Was: Metal guard for plasatic flush mount sensors. Includes two mounting screws. 540-538
Add to Cart Siemens 540-680CA Siemens MSRP: Now: $935.89 Was: TEC Rm Snsr-w/Stpt,Ind,Ovrd Bg 540-680CA
Add to Cart Siemens 540-680FB Siemens MSRP: Now: $935.89 Was: TEC RM SNSR-W/STPT,IND,OVRD,WH 540-680FB
Add to Cart Siemens 540-984 Siemens MSRP: Now: $27.68 Was: Metal flush-mount room temperature sensor with 10K, Type II thermistor. This unit is self-contained, non-intrusive, and tamper-resistant. 540-984