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DwyerMeasurement

Dwyer Sealed temperature sensor O-4A

The Dwyer O-4A is a sealed temperature sensor featuring a 10kΩ Type III Thermistor with 304 stainless steel construction and IP66 protection for industrial process monitoring. Operating range spans -40 to +125°C with…

SKU 3G-CBM-02319

Brand
Dwyer
Item
Sealed temperature sensor O-4A
Category
Measurement
UNSPSC
41112412 — Pressure gauge
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

Dwyer
type
Sealed temperature sensor
accuracy
DIN class B ±0.3°C @ 0°C (for RTD models)
mounting
Suspension or surface
sensor type
10kΩ Type III Thermistor
probe material
304 stainless steel
protection class
IP66
probe diameter mm
5.97
probe length inches
3.5
operating temperature
-40 to +125°C

Technical Documents

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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dwyer O-4A is a sealed temperature sensor featuring a 10kΩ Type III Thermistor with 304 stainless steel construction and IP66 protection for industrial process monitoring. Operating range spans -40 to +125°C with a 5.97 mm probe diameter and 3.5 inch length, suitable for suspension or surface mounting applications.

Frequently Asked Questions

What is the Dwyer O-4A sealed temperature sensor used for?

The Dwyer O-4A is used for monitoring outdoor air and ambient temperatures in building automation systems and ventilated agricultural enclosures. Its IP66 housing and 304 stainless steel probe make it suitable for harsh industrial environments where moisture and dust are present.

What are the specifications of the Dwyer O-4A temperature sensor?

The Dwyer O-4A features a 10kΩ Type III Thermistor sensor with a 304 stainless steel probe measuring 5.97 mm diameter and 3.5 inches long. It operates from -40 to +125°C, has IP66 protection, and can be surface or suspension mounted. Accuracy is ±0.22°C at 25°C.

Where to buy the Dwyer O-4A in Singapore?

3G Electric supplies the Dwyer O-4A sealed temperature sensor to Singapore. We handle sourcing, logistics, customs clearance, and local delivery. Contact our team for pricing and lead time on this model.

How to install the Dwyer O-4A temperature sensor?

The Dwyer O-4A can be surface or suspension mounted using its integral mounting tabs. The removable junction block simplifies wiring connections. For best accuracy, install the probe in free air away from direct heat sources and ensure the IP66 enclosure is properly sealed after installation.

Used in

Common applications for Dwyer
Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management
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Dwyer Products

3G Electric supplies Dwyer measurement. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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