Pneumatic Ratio Relay, Four Port Non Bleed Relay which Produces a Modulating Pressure Output, Proportional in a Fixed Ratio to Pilot Input Changes, 3-13 Psi Output Span, Wall,Inline or Panel Mount, 0.002 Scfm Airflow Usage, Port 1 has 1/4" Barb Fitting , Other ports have 5/32" Barb Fittings, 0-140 Degree Temperature Range, 5-95% RH Operating Humidity Range, 30 Psi Maximum Operating Pressure, Adjustable 0-10 Psi Pilot Start Pressure, Includes Mounting Clip and Scaleplate with KPA Marking

Pneumatic Reversing Relay, Output Varies Inversely with Input with an Adjustable Offset, Reverse Acting, Wall, Inline or Panel Mount, 0.002 Scfm Airflow Usage, Barb Fittings for Three 5/32" and One 1/4" O.D. Plastic Tubing, 0-140 Degree Temperature Range, 5-95% RH Operating Humidity Range, 30 Psi Maximum Operating Pressure

Pneumatic Averaging Relay, Output Pressure Equals Average of Two Input Pressures, 3-15Psi Normal Operating Output Pressure, Wall, Inline or Panel Mount, 0.007 Scfm Airflow Usage, 5/32" Barb Fittings for O.D. Plastic Tubing, 32-125 Degree Temperature Range, 5-95 % RH Operating Humidity Range

Pneumatic Hesitation Relay, Provides Minimum Outside Air Damper Position, Three Port, Wall, Inline or Panel Mount, 0.022 Scfm Airflow Usage, 5/32" Barb Fittings for O.D. Plastic Tubing, 30 Psi Maximum Operating Pressure, 32-125 Degree Temperature Range, 5-95% RH Operating Humidity Range