Four or six independently adjustable contacts
Control several cooling stages and alarm functions from one oil temperature controller.
Oil Temperature Indicators manufacturer and supplier
BWY-D804AITH Digital Oil Temperature Controller
A digital-capable transformer oil temperature controller with multiple switch contacts, Pt100 and current-signal options for local and remote monitoring.
What the BWY-D804AITH Does
See how this model supports temperature indication, control contacts and remote monitoring.
Pt100 and 4-20 mA output configurations
Choose the output that matches the panel input or remote monitoring system.
Multiple scale, power and capillary options for project matching
Match the controller to new transformer production or an existing installation.
BWY-D804AITH Technical Specifications
Use these values to compare models. Request the latest datasheet and drawing for the exact suffix you plan to order.
| Default measuring range | 0°C to 150°C |
|---|---|
| Optional ranges | 0-160°C, -20-140°C or -45-150°C |
| Accuracy | Class 1.5 |
| Switch contacts | 4 or 6 adjustable contacts |
| Switching error | ±2°C |
| Switch differential | Stated as 5 ±3°C |
| Switch rating | AC 220 V / 5 A; DC 110 V / 3 A |
| Signals | Pt100 and 4-20 mA by configuration |
| Power options | AC/DC 220 V or DC 24 V configurations stated |
| Bulb and thread | Φ14 × 150 mm; M27 × 2 mm |
| Standard capillary | 6 m; custom lengths available |
| Protection grade | IP55 |
| Enclosure | 304 × 192 × 103 mm |
BWY-D804AITH Product Overview
The BWY-D804AITH combines a transformer oil temperature controller with remote signal capability and multiple adjustable switches. It supports local indication, cooling control, alarm logic and connection to a remote temperature display or supervisory system.
Several ranges and power arrangements are available. The dial scale, signal, contact quantity and supply must all appear in the purchase specification. A model name without its confirmed configuration is insufficient for a replacement order.
How the BWY-D804AITH Measures Temperature
The local sensing mechanism responds to top-oil temperature through the bulb and capillary. Adjustable contacts operate across the selected range.
Pt100 or 4-20 mA outputs connect to compatible remote equipment. An optional display can retransmit a 4-20 mA signal and provide RS485 communication according to the selected configuration.
Selecting the Correct BWY-D804AITH
Confirm range, contact quantity, contact duty, signal, supply, capillary, enclosure mounting and remote display.
Provide the existing nameplate and panel cutout for retrofit work. Check that the receiving system accepts the specified signal and scale.
BWY-D804AITH Installation and Commissioning
Mount the enclosure securely, insert the bulb into the intended oil pocket and protect the capillary along its entire route.
Verify supply voltage before energization. Loop-test the Pt100 or current output and function-test all contact stages.
Where the BWY-D804AITH Is Used
Digital transformer top-oil monitoring
Four-stage or six-stage control schemes
Remote control-panel indication
Oil temperature controller modernization
Related BWY-D804AITH Selection Resources
Compare the Product Category
Review other models for the same transformer temperature measurement and control function.
Compare oil temperature indicatorsPlan Cooling, Alarm and Trip Control
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Transformer cooling and protection applicationPrepare a Replacement
Compare existing codes, outputs, capillary routing and mounting interfaces before a controller replacement.
Transformer OTI and WTI replacement guideReview Supplier Documents
Check available management-system, conformity and qualification materials for procurement review.
Certification and qualification documentsSales and engineering support
Request BWY-D804AITH Datasheet and Pricing
Tell us the transformer type, required temperature range, contact functions, output signal, capillary length, quantity and destination. We will help you identify a suitable model and send the available technical documents.