Series EPTA Electro-Pneumatic Transducers

Low Cost, Selectable Input/Output, Manual Override

The Series EPTA Electro-Pneumatic Transducers convert an analog input signal to a linearly proportionate pneumatic output by modulating its control valves to regulate branch line pressure to the set point determined by the input signal. All models incorporate two low voltage valves, an integral in-barb filter, a 0 to 30 psi analog gage, an anodized aluminum manifold, and brass barbed fittings. The EPTA offers adjustable span and offset as well as manual override. This unit has no air consumption and is immune to mounting orientation. Output pressure ranges include field-selectable 0 to 10, 0 to 15, and 0 to 20 psig. Also included is an analog 0 to 5 VDC feedback signal indicating the resultant branch line pressure. Universal 24 VAC/24 VDC supply voltage and field-selectable 4 to 20 mA, 0 to 5 VDC, 0 to 10 VDC, or 0 to 15 VDC inputs ensure single unit compatibility with most systems. The standard models maintain branch pressure on power loss while the Fail-Safe models will drop the branch pressure to 0 psi on power loss. Mounting configurations include a metal bracket mount in the EPTA-B models and a snap-track mount in the EPTA-S models. The A-400 accessory kit will allow the EPTA-S models to be mounted on a standard DIN rail.

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Product Applications

  • Operation of valve actuators, positioners, damper and louver actuators.

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Model Description Usually Ships* Price Code Order
Ships: 3-4 Weeks
Price: $308.00
Electro-pneumatic transducer, metal bracket mount. 3-4 Weeks* $308.00 B Order
Ships: 3-4 Weeks
Price: $380.00
Electro-pneumatic transducer, metal bracket mount with fail-safe. 3-4 Weeks* $380.00 B Order
Ships: Same Day
Price: $291.00
Electro-pneumatic transducer, standard snap-track mount. Same Day* $291.00 B Order
Ships: Same Day
Price: $366.00
Electro-pneumatic transducer, standard snap-track mount with fail-safe. Same Day* $366.00 B Order


Clean dry air or any inert gas.
Input Signal:
DC Current (4-20 mA) or DC Voltage (0-5/0-10/0-15).
Input Impedance:
Current: 250 ohms; Voltage: Infinite.
Output Signal:
Jumper selectable 0-10 psig (0-69 kPa), 0-15 psig (0-103 kPa), or 0-20 psig (0-138 kPa).
Feedback Output:
0 to 5 VDC.
Air Supply:
25 psig (172 kPa) maximum.
Air Flow:
750 scim.
Air Consumption:
0 scim normal operation, Fail-Safe model vents to 0 psi on power loss.
±1.0% full scale @ room temperature; ±2.0% full scale @ 32 to 120°F (0 to 48.8°C).
Supply Voltage:
24 VDC (+10%/-5%) or 24 VAC (±10%) 50/60 Hz.
Supply Current:
180 mA maximum, 200 mA maximum on Fail-Safe model.
Temperature Limits:
Operating: 32 to 120°F (0 to 48.8°C); Storage: -20 to 150°F (-6.7 to 65.6°C).
Operating Humidity Range:
5 to 95%, non-condensing.
Pressure Connections:
1/4" O.D. (polyethylene tubing optimum).
Electrical Connections:
Plug-in block terminal type with 5 mm pin spacing.
Wire Size:
Up to one 14 AWG per terminal.
EPTA-S0: 6.9 oz. (196 g), EPTA-S1: 9.2 oz. (261 g), EPTA-B: 14.5 oz. (411 g).


  • Adjustable span and offset
  • Manual override
  • Field selectable output ranges
  • Not position sensitive


Model Number Description Usually Ships* Price Code Order
A-400 DIN mounting kit. 3-4 Weeks $7.40 B Order
A-403 Replacement integral barb filter. 3-4 Weeks $7.40 B Order

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