The Hochiki YBN-NSA-4 4-inch Analog Sensor Base is compatible for use with Hochiki NS Series Analog sensors: AIEEA, ALG-V, ALK-V, ALK-D, ALN-V, ATG-EA, ATJ-EA and ACA-V.
NOTE: See Hochiki HSB-NSA-6 for a 6-inch equivalent base.
This base is also known as a Fike Corportation 63-1020