Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

Dwyer Medium flow metal probe MAFS-20 - Measurement
DwyerMeasurement

Dwyer Medium flow metal probe MAFS-20

Dwyer MAFS-20 is a medium flow metal probe for fluid measurement applications, featuring a 71 cm probe length and 1/4-20 thread connection. Ideal for industrial process monitoring and control systems requiring direct…

SKU 3G-CBM-02213

Also listed as: DWY 28018 · DWY-28018

Brand
Dwyer
Item
Medium flow metal probe MAFS-20
Category
Measurement
UNSPSC
41112412 — Pressure gauge
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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
thread size
1/4-20
connection type
metal probe
probe length cm
71

Datasheet Content

Série MAFS Sonde métallique de débit moyen Le profil fournit une performance accrue et une perturbation de débit minimale 1/2 [12.70] 1 APPROX. 4X Ø7/32 [25.40] 1/4-20 29/64 [Ø5.54] [11.41] 2 33/64 THREADED 1-11/32 [50.80] [12.95] 33/64 STUD [34.25] [12.95] 1-13/64 1-1/2 2 1-35/64 [38.10] [50.80] [39.37] [30.44] 1-3/64 [26.43] 1/4 21/64 [6.35] [8.46] 49/64 1/4 1-1/2 L [19.43] [6.35] [38.10] La Série MAFS est idéale pour une utilisation avec les Instruments Dwyer, précision de l’air, Longueur Longueur capteur de vitesse, transmetteurs et commutateurs. La Série MAFS utilise des points de mesure Modèle de Sonde Réf. Modèle de Sonde Réf. de la pression statique et totale répartis uniformément pour délivrer une mesure précise des flux (en cm) (en cm) dans la conduite. Le profil de pale fournit une performance accrue avec une perturbation du débit MAFS-04 10 DWY28002 MAFS-24 60 DWY28022 minimal dans l’afflux d’air. La sonde de mesure du débit d’air peut être complètement installée MAFS-06 15 DWY28004 MAFS-26 66 DWY28024 depuis l’extérieur de la conduite ronde, rendant l’installation très rapide. Par sa légèreté et sa construction durable, auxquelles s’ajoute sa facilité d’installation, la sonde de débit MAFS est MAFS-08 20 DWY28006 MAFS-28 71 DWY28026 parfaitement adaptée aux application dans l’industrie HVAC. MAFS-10 25 DWY28008 MAFS-30 76 DWY28028 MAFS-12 30 DWY28010 MAFS-32 81 DWY28030 SPÉCIFICATIONS MAFS-14 35 DWY28012 MAFS-34 86 DWY28032 Service : Air propre. Matériaux : Aluminium AA6063. MAFS-16 40 DWY28014 MAFS-36 91 DWY28034 Précision : de 400 à 9000 FPM (45.7 m/s); ±2% FS, ±3% FS pour 6” et 48” de longueur MAFS-18 45 DWY28016 MAFS-40 101 DWY28036 des modèles. Facteur K : de 0,81, 0,80 pour 6” et 48” de long, 4” longueur = 0,82. MAFS-20 50 3G-CBM-02213 MAFS-48 111 DWY28038 Température Max. : 204°C; Joint : -35 à +110°C. MAFS-22 55 DWY28020 Débit de Conception Minimum : 2 m/sec. Débit de Conception Maximum : 61 m/sec. Raccord : double canelés pour 3/16” ou 1/4” ID de tubage. Critères de Tuyauterie Droite : 5 fois le diamètre ou la longueur du plus grand côté.

Technical Documents

(1)
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

Dwyer MAFS-20 is a medium flow metal probe for fluid measurement applications, featuring a 71 cm probe length and 1/4-20 thread connection. Ideal for industrial process monitoring and control systems requiring direct immersion flow sensing.

Frequently Asked Questions

What is the Dwyer MAFS-20 used for?

The Dwyer MAFS-20 is a medium flow metal probe used for direct immersion flow sensing in HVAC and industrial process monitoring. It measures air velocity in ducts using evenly spaced static and total pressure points, providing accurate flow measurement with minimal airflow disturbance.

What are the specifications of the Dwyer MAFS-20?

The Dwyer MAFS-20 has a 71 cm probe length with a 1/4-20 threaded connection. It is made of aluminium AA6063, rated for clean air service up to 204 °C, with an accuracy of ±2% FS from 400 to 9000 FPM. Minimum design flow is 2 m/s, maximum is 61 m/s.

Where to buy the Dwyer MAFS-20 in Singapore?

You can source the Dwyer MAFS-20 from 3G Electric in Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this item.

How to install the Dwyer MAFS-20?

Install the Dwyer MAFS-20 by inserting the probe into a round duct from outside, using the 1/4-20 threaded stud for secure mounting. Ensure 5 duct diameters of straight pipe upstream for accurate readings. Connect the dual barbed fittings to 3/16" or 1/4" ID tubing.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Dwyer
Dwyer
Metal medium flow probe MAFS-12
Dwyer
Dwyer
Metal average flow probe MAFS-22
Dwyer
Dwyer
Average flow metal probe MAFS-34
Dwyer
Dwyer
Metal average flow probe MAFS-14
Dwyer
Dwyer
Metal average flow probe MAFS-10
Dwyer
Dwyer
Metal average flow probe MAFS-28

More from Dwyer

View all Dwyer parts
Magnehelic pressure gauge 2000-30PA
Dwyer
Magnehelic pressure gauge 2000-30PA
Flow meter FS 2
Dwyer
Flow meter FS 2
Dwyer
Dwyer
Average flow probe PAFS-1002
Dwyer
Dwyer
MAFS-48 metallic average flow probe
Dwyer
Dwyer
Transmitter 645-6
Dwyer
Dwyer
Current detector SCS-211125-R
Dwyer
Dwyer
Current transmitter SCT10-102
Dwyer
Dwyer
Current transmitter CCT 50-203