Bellofram Type 1000 I/P (Current to Pneumatic) Transducers

The acknowledged industry standard, Bellofram’s Type 1000 transducers reduce a supply pressure to a regulated output pressure proportional to the 4-20 mA electrical input signal, typically used to provide air to an actuator to control a damper or valve positioner. T1000 supply pressure can range from 3 PSIG above maximum regulated output up to 100 PSIG.

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Features of Bellofram Type 1000 I/P Transducers

  • Light weight, mounts at any angle
  • For clean, dry, oil-free air
  • Low air consumption
  • Wide supply pressure range, with low supply pressure sensitivity
  • General service models have external zero and span adjustments
  • Built-in volume booster
  • Linearity <1.0% span, repeatability <0.5% span, hysteresis <1.0% span
  • Models available with FM, CSA, CE approvals
  • General purpose 3-15 PSIG model can be recalibrated to 3-9 PSIG or 9-15 PSIG for split-ranging applications. This model normally available from Lesman stock.
  • Ships with flat mounting bracket and mounting screws

Applications of Bellofram Type 1000 I/P Transducers

  • Valve Actuators
  • Damper and Louver Actuators
  • Valve Positioners
  • Controllers
  • Relays
  • Air Cylinders
  • Clutches and Brakes
  • Liquid, Gas and Slurry Processing Instrumentation
  • HVAC Systems
  • Paper Handling Controls
  • Textile Processing Systems
  • Energy Management Systems
  • Petrochemical Processing Systems
  • Split Ranging


Specification of Bellofram Type 1000 I/P Transducers

Flow Rate 339 lpm @ 100 psi inlet
Inlet Port Size 0.25″
Outlet Port Size 0.25″
Operating Temperature -29 to 60 C (-20 to 140 F)
Raw Specs From Vendor
Adjustment Range 15 PSI (1.03 BAR)
Features Low Cost. Built-In Volume Booster. Small Size. Field Reversible. Low Air Consumption. Mounts At Any Angle. Convenient External Span And Zero Adjusts. Light Weight. Wide Supply Pressure Range. Low Supply Pressure Sensitivity. Flying Leads Connection. Accuracy 2% Of Span.
Flow Rate 339 lpm @ 100 psi inlet
Maximum Pressure Measured 100 PSIG (6.9 BAR)
Mounting Type Pipe, panel or bracket
Operating Temperature -29 to 60 C (-20 to 140 F)
Port Size 0.25 in
Series T1000 Series
Special Features Flying leads Connection/ 220 Ohms