Model T5220 Fast Response High Flow I/P, E/P Transducer

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The Fairchild T5220 Transducer is an electro-pneumatic device that converts a DC current or voltage input signal to a proportional pneumatic output. It features an integrated volume booster output, which meets input requirements of final control elements requiring a higher capacity output signal and/or increased output pressure.


  • Fast Response to Input Signal changes results in faster loop control and savings in process materials.
  • Integrated Volume Booster Output meets input requirements of final control elements requiring a higher capacity output signal and/or increased output pressure.
  • Six Input Signal Ranges meet most process and machine requirements.
  • Negative Bias Option allows zero pressure based operation.
  • Five Booster Ratios meet industrial equipment requirements for higher output pressure ranges.
  • Temperature Compensation provides stable operation under environmental changes.
  • Vibration Resistance maintains set points under adverse vibration conditions.
  • Various Mounting Configurations allow installation flexibility for most applications.
  • NEMA 3R or optional NEMA 4X Enclosure for outdoor and indoor installations.
  • Conduit Port for convenient wiring.

Operating Principles

The Fairchild T5220 Transducer is an electropneumatic device that converts a DC current or voltage input signal to a proportional pneumatic output This device is made up of two sections, the Signal Conversion Section and the Pneumatic Section.

The Signal Conversion Section (PC Board) accepts a DC current or voltage. This signal is applied to a coil which creates a magnetic force that moves a Flexure Arm.

The Pneumatic Section operates as a force balance system. A Sapphire Ball floats inside a Nozzle and controls the output pressure by exhausting air supplied through an Orifice. This Sapphire Ball acts as a piston exerting a force which is balanced against the force transferred to the Flexure Arm by the Coil.

The Booster Section amplifies the output pressure of the transducer. At set point, the force due to transducer output pressure acting on the top of the Upper Diaphragm is balanced by the force due to booster output pressure acting on the underside of the Lower Diaphragm.


Supply Pressure1
20 + 2 psig, [1.5 + 0.15 BAR], (150 + 15 kPa)
Output Capacity (SCFM)
15 (25.5 m³/HR) Max. @ 20 psig, [1.5 BAR], (150 kPa) supply. 45 (76.5 m³/HR) @ 100 psig, [7.0 BAR], (700 kPa) (with separate supply.)
Exhaust Capacity (SCFM)
7 (11.9 m³/HR) downstream pressure @ 5 psig, [.35 BAR], (35 kPa) above 3 psig, [0.2 BAR], (20 kPa) set point.
14 (23.8 m³/HR) downstream pressure @ 5 psig, [.35 BAR], (35 kPa) above 15 psig, [1.0 BAR], (100 kPa) set point.
Air Consumption (SCFM)
0.28 (0.48 m³/HR) Max. (dead end) @ 20 psig, [1.5 BAR], (150 kPa) supply
Output Range (1:1 Ratio)
3-15 psig, [0.2-1.0 BAR], (20-100 kPa)
Supply Pressure Effect
+ 0.3% of Span for a 1 psig, [0.07 BAR], (7 kPa) supply change between 18-22 psig, [1.2-14.5 BAR], (120-145 kPa).
Shock & Vibration Effect
Negligible up to 2 g's between 5 Hz and 200 Hz
Terminal Based Linearity
+ 0.50% Full Scale (T5220 only), within 0.6% Output Span (T5222-T5226)
Independent Linearity
within 0.25% Full Scale (T5220 only), within 0.3% Output Span (T5222-T5226)
Hysteresis & Repeatability
within 0.1% Full Scale (T5220 only), within 0.1% Times Ratio of Output Span (T5222-T5226)
Impedence / Input Signal

Range OHMS (nominal)
1-5 mA 2000
4-20 mA 1202
10-50 mA 502
1-5 VDC 375
0-6 VDC 375
0-12 VDC 2550
1-9 VDC 2550

Ambient Temperature
-40°F to +150°F, (-40°C to +65.5°C)
Temperature Coefficient
Less than 1% of Span / 50°F (10°C)
Materials of Construction
Body and Housing: Aluminum
Ball and Orifice: Sapphire, Brass
Nozzle: Stainless Steel

1 Standard unit is configured for common supply to transducer and booster.
2 Units require 20 psig, [1.5 BAR], (150 kPa) for transducer and a separate supply for booster. A common supply of up to 110 psig, [7.7 BAR], (770 kPa) can be used provided the prefix Z147 is added to the original order, and the supply pressure is noted.

Catalogue PDF: application/pdf
Operational PDF: application/pdf
Located in: Transducers

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