TAC Pneumatic Products Catalog

Air Differential Pressure Switch
The R436 differential pressure switch is a sensitive
and reliable device for remotely sensing the
operation of fans or blowers associated with
ducted ventilating systems, and for sensing static
pressure drop across filters. Pressure differentials
as small as 0.05 in. WG are sufficient to actuate the
SPDT contacts, which in turn operate remote
status indicators, alarms, or control circuits of
other devices.
Features:
• Different setpoint adjustable from 0.05 to 12 in. WG to suit
various applications.
• The R436 is field adjustable over a wide range of
pressures, and is relatively insensitive to temperature
extremes. It is recommended for any differential pressure
application within its operating range.
Model Chart
Model No.
Wholesale
Model No.
R436 2374-410 Air Differential Pressure Switch.
Specifications
Accessories
Description
Figure 1 Switch Action and Terminal Identification.
R436
Setpoint Field adjustable 0.05 �0.02 to 12 in. (1.3 �0.5 to 305 mm) WG.
Differential 0.02 in. (0.5 mm) WG with increase to 0.8 in. at higher operating pressures.
Maximum pressure 0.5 psig (3.4 kPa).
Electrical switch SPDT, 300 VA pilot duty at 115 to 277 Vac; 10A non-inductive to 277 Vac.
Connections Screw terminals with cup washers.
Sampling line connections Connectors supplied accept 1/4 in. O.D. rigid or semi-rigid tubing; slip-on tubing adaptors available.
Mounting Diaphragm vertical.
Conduit opening 7/8 in. diameter for 1/2 in. conduit.
Operating temperature limits -40 to 180�F (-40 to 82�C).
Dimensions 6-1/8 H x 3-7/8 W x 3-1/4 D in. (156 x 98 x 83 mm).
Locations NEMA 1.
C
(common)
Model No. Description
AP-302 Static pressure sensing tip for 1/4 in. O.D. tubing.
AP-305 Static pressure sensing tip for 1/8 in. pipe thread.
N.C.
N.O.
Increase
Pressure
F-27383-1 © Copyright 2006 TAC. All Rights Reserved. 83
R436