500AC Electro Pneumatic Converter Order
A repeat order for the most standard configuration in the EAA-500 family, built as one batch rather than accumulated from stock so that every unit in the shipment behaves the same way.
Controlair Type Transducer 500-AC configuration, 4-20 mA input, 3-15 psi (0.2-1.0 BAR) output, 180 ohms
What The Customer Needed
The buyer was replacing converters across a group of valves that had been fitted at different times. Units drawn from different production runs had shown different calibration behaviour, which made loop tuning a per-valve job instead of a one-off.
How It Was Built
The whole quantity was built in a single run, from one batch of parts, and calibrated consecutively on the same bench against the same standard current generator and 0.1 class pressure gauge.
What The Photographs Show
The batch photographs show the units laid out on the bench with their signal leads connected for calibration. Zero is set at 4 mA against 20 kPa and span at 20 mA against 100 kPa, then the two points are repeated until both hold.





How It Finished
One consistent batch, calibrated on one bench, so the loops could be tuned once and the settings reused across the group.
The Models Behind This Order
Controlair Type Transducer500AC Electro Pneumatic Transducer
500-AC configuration, 4-20 mA in, 3-15 psi out, 180 ohms
View specifications →
Controlair Type Transducer500X Electro Pneumatic Transducer
Controlair pattern I/P transducer, 4-20 mA in, 3-15 to 3-120 psi out
View specifications →
Controlair Type Transducer500X Electro Pneumatic Converter
Controlair pattern E/P converter, 0-5 V, 1-9 V and 0-10 V inputs
View specifications →
Controlair Type Transducer500ACD Electro Pneumatic Transducer
500-AC range with a plug-in electrical termination
View specifications →Questions About OEM Orders
Can this configuration be supplied under our own brand
Yes. Nameplates are printed to customer artwork and part numbering and checked against the build before fitting.
How is a batch kept consistent
The whole quantity is built in one run and calibrated consecutively on the same bench against the same standard current generator and 0.1 class pressure gauge.
What is the specification on this order
500-AC configuration, 4-20 mA input, 3-15 psi (0.2-1.0 BAR) output, 180 ohms.
Can we order a different range in the same body
Yes. The published selection table or coding system for this pattern lists the available input signals, output ranges and terminations.
Order The Same Configuration
Send the range, the termination and the quantity, and the quotation comes back against the published selection table for this pattern.
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