500X I/P Transducer
The 500X is an electro pneumatic transducer (I/P and E/P converter) that converts a current or voltage input signal into a...
What This Model Does
The 500X is an electro pneumatic transducer (I/P and E/P converter) that converts a current or voltage input signal into a linearly proportional pneumatic output pressure. Designed around an open loop control principle using a small mass magnet, it delivers accurate air pressure control for industrial processes. It accepts electrical signals such as DC 4 to 20 mA from a DCS or controller and outputs pneumatic control signals, including standard 20 to 100 kPa or 3 to 5 psig ranges, as well as extended pressures up to 145 psig. It serves as a direct form fit and function alternative for Controlair type 500X transducers used to pilot pneumatic film regulating valves and pneumatic valve positioners.
| Model | 500X (Type EAA-500) |
|---|---|
| Product Type | I/P and E/P transducer (electro pneumatic converter) |
| Control Type | Open loop control with small mass magnet |
| Input Signal | 4 to 20 mA DC, current or voltage |
| Standard Output Range | 20 to 100 kPa / 3 to 5 psig |
| Extended Output Range | Up to 145 psig |
| Position Sensitivity | Not affected by position |
| Interference Protection | Anti-RFI and anti-EMI |
| Housing Colour | Black, blue, yellow or painted to customer requirement |
| Warranty | 18 months |
Why Buyers Specify This Model
- Converts electric current or voltage signals directly into linear proportional air pressure
- Uses open loop control and a small mass magnet to ensure accurate pressure regulation
- Unaffected by mounting position, allowing flexible orientation on panels, skids or field valves
- Provides built-in resistance against RFI and EMI electrical interference in plant environments
- Extended range models supply up to 145 psig pneumatic output for high pressure operating systems
- Standard range models supply 20 to 100 kPa (3 to 5 psig) output for process control loops
- Drop-in replacement for Controlair 500X installations without redesigning electrical or pneumatic pipework
Problems It Solves
- DCS electric current signals cannot directly drive legacy pneumatic film control valves or positioners
- Instrument mounting orientation restrictions causing output pressure drift or calibration loss
- Electromagnetic and radio frequency noise from surrounding plant equipment interfering with signal integrity
- Long lead times on original-brand I/P transducers leaving process loops running on manual bypass
- Standard low-pressure transducers cannot meet pneumatic pressure requirements up to 145 psig
Application Scenarios
- Interfacing DCS 4 to 20 mA analog outputs with pneumatic film regulating valves on process lines
- Providing the pneumatic air pilot signal to an existing pneumatic valve positioner lacking an internal converter
- Industrial pneumatic systems requiring extended pneumatic output pressures up to 145 psig
- Signal conversion between electronic control room instruments and field-mounted pneumatic instruments
- Replacing failed or obsolete Controlair type 500X units without delaying maintenance schedules
Who It Is For
- Plant instrument technicians replacing worn or malfunctioning I/P converters on control valve skids
- Valve automation packagers and OEMs who need reliable I/P transducers branded with their own name
- Distributors supplying form fit and function replacement instrumentation spares to local process facilities
- EPC contractors sourcing cost-effective signal conversion units for industrial process automation projects
- Trading companies sourcing quick-delivery replacements for Controlair pattern electro pneumatic transducers
Technical Features
- Open loop electro pneumatic pressure control mechanism utilizing a small mass magnet
- Converts DC 4 to 20 mA, alternate current or voltage inputs into proportional pneumatic pressure
- Linear output ratio matching input command across standard and extended pressure spans
- Immunity to mounting position changes for installation in any physical orientation
- Protected against radio frequency interference and electromagnetic interference (RFI and EMI)
- Standard process output range of 20 to 100 kPa (3 to 5 psig) and extended output up to 145 psig
Materials and Construction
- Industrial metal housing engineered for process environments
- Internal small mass magnet assembly for responsive open loop pressure conversion
- Full material and finish breakdown is given in the datasheet PDF
Dimensions and Connection Detail
Reference image published with this model on the original catalogue. Confirm critical dimensions against the datasheet before machining a bracket.
Manufacturing and Quality Control
Every unit is calibrated and stroke tested before it is packed. We can film or photograph your units in the sample room or warehouse before they ship.
Manufacturing Steps
Housing casting and precision machining to Controlair 500X pattern dimensions
Assembly of internal electromagnetic coil and small mass magnet mechanism
Pneumatic section fitting and internal seal verification
Calibration of input electrical signal against output pressure range
Linearity and output pressure verification on test bench
Surface painting in specified housing colour and nameplate printing
Inspection and packaging into protective inner boxes and export cartons
Quality Control
- Every transducer is pressure tested and calibrated across its input signal span before packing
- Real product photos or video can be recorded in the sample room or warehouse prior to shipment
- Defective units within the 18 month warranty are replaced on photo or video evidence rather than repaired
- Warranty replacement units are shipped with the next scheduled order or dispatched urgently if a line is down
Customisation Options
- OEM branding with customer logo and custom nameplate markings
- Housing painted in custom colours including standard black, blue, yellow and others
- Newly designed shape modules developed to match specific customer mounting or enclosure profiles
- Customised outer carton and inner protective packaging formats
- Supplied alongside pneumatic valve actuators, limit switch boxes and pilot valves
How It Compares With the Alternatives
| Closed loop electronic transducers | The 500X uses an open loop small mass magnet design for high reliability and repeatable pressure at lower procurement cost |
|---|---|
| Valve positioners with built-in feedback | The 500X regulates output air pressure to 20 to 100 kPa or 145 psig, but does not read valve stem mechanical position |
| Position-sensitive beam converters | The 500X is completely unaffected by mounting orientation, whereas beam-type units require recalibration when tilted |
| Original Controlair 500X units | Matches form, fit and function identically while shipping in 2 to 3 days from stock at factory-direct pricing |
Fitting and Setting Up This Model
General field procedure. Always follow the datasheet for the exact calibration sequence and any hazardous area requirements.
Mount the transducer on the valve yoke, bracket or panel in any required physical orientation
Supply clean, dry instrument air to the pneumatic supply inlet port
Connect the pneumatic output port to the diaphragm chamber, positioner inlet or pneumatic instrument
Wire the DC 4 to 20 mA or voltage input signal leads observing positive and negative polarities
Check that surrounding industrial cabling does not exceed standard RFI and EMI shielding practices
Verify zero and span pressure output across the input signal stroke using an accurate pressure gauge
Ensure supply air filtration is maintained to avoid particulate contamination within internal pneumatic passages
500X I/P Transducer FAQ
What is the lead time for the 500X transducer?
Regular order quantities normally ship in 2 to 3 days from stock. Large project quantities ship in 7 to 10 days.
Is the 500X sensitive to mounting orientation?
No. The 500X uses a small mass magnet open loop design that is not affected by mounting position, allowing horizontal, vertical or inverted installation.
What output pressure ranges can this converter handle?
Standard process models output 20 to 100 kPa (3 to 5 psig). Extended range models are available with outputs reaching up to 145 psig.
Can we purchase units branded with our company logo and colour?
Yes. We offer OEM and ODM services including custom nameplates, customer logos and housing painting in black, blue, yellow or other specified colours.
How is the 18 month warranty handled if a unit fails?
Send photo or video evidence of the fault. We replace the unit rather than repairing it, typically dispatching the replacement with your next order or immediately if critical.
Can I see photos or video of my specific units before dispatch?
Yes. Upon request, our sales staff will take real photos and videos of your units in our warehouse or sample room before shipment.
Can this transducer replace an original Controlair 500X directly?
Yes. It is engineered as a direct form, fit and function replacement for standard Controlair type 500X applications converting electrical signals to pneumatic pressure.
Applications Cases and Guides
Related Case Photos
Related Products
Get A Price on This Model
Tell us the quantity, the actuator it goes on and the destination port. We come back with price, lead time and confirmation that the model matches your valve.