Johnson Controls T-3610-1003 : Pneumatic Low Limit Controller, 0 to 270 Deg F (-18 to 132 Deg C), Proportional, Direct Acting, 18 in. (46 cm) Rigid Stem Element with Duct Mounting Bracket
Johnson Controls T-3610-1002 : Pneumatic Low Limit Controller, 0 to 270 Deg F (-18 to 132 Deg C), Proportional, Direct Acting, 18 in. (46 Cm) Rigid Stem Element with Plastic Mounting Bracket for Unit Ventilators
Johnson Controls T-3610-1001 : Pneumatic Low Limit Controller, 0 to 270 Deg F (-18 to 132 Deg C), Proportional, Direct Acting, 8 ft Averaging Element with Five Element Holders and Duct Mounting Bracket