Not sure about that product line in particular, but this series has programmable deadband so you can make it do that:
http://www.amazon.com/Johnson-Contr..._UL160_SR160,160_&refRID=0SQ2YCKNCFTP8DBHCX74
http://www.amazon.com/Johnson-Contr..._UL160_SR160,160_&refRID=0SQ2YCKNCFTP8DBHCX74