DwyerMeasurement

Dwyer Sealed temperature sensor O-4A

SKU 3G-CBM-02319

Also listed as: DWY 52002 · DWY-52002

Brand

Dwyer

Item

Sealed temperature sensor O-4A

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Delivery: Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to: Singapore

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 

Datasheet Content

Série
     O-4             Capteurs de température étanche
                     IP66, Bloc de Jonction Amovible
                                                                                                   2X     2X .250
                                                                                                  .375               2X Ø.188


                                                                                                                              3-31/64
                                                                                                                               [88.5]
                                                                                                                           3
                                                                                                                         [76.2]      4
                                                                                               6-3/8                              [101.6]
                                                                                             [161.48]                                                         1-27/64
                                                                                                                                                              [36.12] 1-31/64
                                                                                                                                                                      [37.70]

                                                                                                               2x 5/16
                                                                                                                [7.94]
                                                                                                            2-3/4
                                                                                                           [69.85]


La Série O-4 Capteurs de Température de l’Air Extérieur est excellent pour la                       SPÉCIFICATIONS
surveillance des températures de l’air ambiante dans le cas d’applications en espace extérieur.     Précision : Capteur de température de thermistance : ±0.22°C @ 25°C ;
Les capteurs de température sont montés dans un boîtier IP66 avec des ergots de montage             RTD capteur de température : DIN classe B : ±0.3°C @ 0°C.
intégraux. Ces ergots peuvent être utilisés pour le montage en surface ou en suspension des         Température de fonctionnement : -40 à +125°C.
capteurs de température. Le bloc de jonction amovible rend l’installation plus aisée. La Série      Diamètre de la Sonde : 5.97 mm.
O-4 peut être utilisée pour mesurer les températures de l’air extérieur dans les systèmes           Longueur de la Sonde : 3.5”.
d’automation de bâtiments ou de températures de chambres au sein de demeures agricoles              Matériau de la Sonde : inox 304.
ventilées.                                                                                          Montage : En suspension ou en surface.
                                                                                                    Caractéristiques du Boîtier : IP66.
 Modèle           Type de Capteur                                                 Réf.              Poids : 85 g.
 O-4A             10KΩ Type III Thermistance                                    3G-CBM-02319
 O-4B             10KΩ Type II Thermistance                                     DWY52004
 O-4C             3KΩ Thermistance                                              DWY52006
 O-4D             Pt100Ω RTD                                                    DWY52008
 O-4E             Pt1000Ω RTD                                                   DWY52010
 O-4F             20KΩ Thermistance                                             DWY52012

Technical Documents

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Technical Document 1

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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

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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