DwyerMeasurement

Dwyer Temperature sensor sealed O-4B

Dwyer sealed temperature sensor with 10kΩ Type II Thermistor for industrial process monitoring. Operates from -40 to +125°C in IP66-rated stainless steel 304 probe (5.97 mm diameter). Suitable for suspension or…

SKU 3G-CBM-02320

Also listed as: DWY 52004 · DWY-52004

Brand

Dwyer

Item

Temperature sensor sealed O-4B

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

mounting

suspension or surface 

ip rating

IP66 

sensor type

10kΩ Type II Thermistor 

probe material

stainless steel 304 

probe diameter mm

5.97 

probe length inch

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                                    DWY52002
 O-4B             10KΩ Type II Thermistance                                     3G-CBM-02320
 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

Frequently Asked Questions

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

The Dwyer O-4B sealed temperature sensor is used for outdoor air temperature monitoring in building automation systems and ventilated agricultural enclosures. Its IP66-rated stainless steel 304 probe and 10kΩ Type II Thermistor make it suitable for harsh plant environments requiring suspension or surface mounting.

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

The Dwyer O-4B features a 10kΩ Type II Thermistor, operates from -40 to +125°C, and has a 5.97 mm diameter stainless steel 304 probe with 3.5 inch length. It is IP66-rated and supports suspension or surface mounting. The removable junction block simplifies installation.

Where to buy the Dwyer O-4B temperature sensor in Singapore?

3G Electric supplies the Dwyer O-4B temperature sensor to Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact our team for pricing and lead time on this model (SKU 3G-CBM-02320). We provide local technical support for industrial process monitoring applications.

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

The Dwyer O-4B can be surface-mounted using integral mounting tabs or suspended by its probe. The removable junction block simplifies wiring connections. For best accuracy, mount the sensor in a location representative of the air temperature being measured, away from direct heat sources or drafts.

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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