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Dwyer Transmitter 645-4 - Measurement
DwyerMeasurement

Dwyer Transmitter 645-4

The Dwyer 645-4 is a pressure transmitter for industrial process monitoring, offering ±0.25% accuracy and IP65 rating. It handles 0–25 psid with 1/4 inch NPT female connection and 30–50 ms response time, fitting…

SKU 3G-CBM-02202

Also listed as: DWY 26010 · DWY-26010

Brand
Dwyer
Item
Transmitter 645-4
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
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
housing
stainless steel/aluminium
accuracy
±0.25%
ip rating
IP65
connection
1/4 inch NPT female
pressure kpa
0-1.72
response time
30-50 ms
pressure range
0-25 psid
loop resistance
0-1000Ω

Datasheet Content

Transmetteur de pression différentielle pour liquides Série 645 ±0.25% de précision, réponse rapide, basse pression 1-63/64 ø7/8 KNOCKOUT INTENDED FOR [50.50] 1-1/2 A 1/2 I.D. CONDUIT CONNECTION [38.16] 1-3/32 DWYER INSTRUMENTS, INC. MICHIGAN CITY, IN. U.S.A. 2 5/32 1-15/16 [27.98] [54.61] [49.35] 3-1/16 [77.59] 3 1/64 [76.45] 1 [25.44] 1/4 NPT HIGH LOW BOTH SIDES 2-7/16 1 PRESSURE [62.01] PRESSURE PORT PORT BLEED SCREWS [25.44] La série 645 Transmetteur de Pression Différentielle pour liquides est conçue SPÉCIFICATIONS pour un usage compatible avec les gaz et liquides et utilisée tant pour la mise en pression que Service : Gaz et liquides compatibles pour l’usage en pression comme en référence. comme ports de référence. La sonde capacitive à réponse rapide délivre un signal de sortie de 4 à Matériaux : 17-4 PH acier inoxydable, Série 300 acier inoxydable, élastomères fluorés et joints 20 mA proportionnel à la pression différentielle avec ±0.25% de précision. La série de transmetteurs toriques en silicone and joints de vis d’extraction. Précision : ±0.25% FS (RSS). 645 est idéale pour les contrôles de procédé, la surveillance de l’état des filtres, le matériel de Limites de Température : Opérationnelle : de -22 à +80°C ; Stockage : de -54 à réfrigération, le contrôle de débit de pompe, l’équipement HVAC et la mesure des niveaux de liquide. +126°C. Limites de Pression : (Côté haut) de 0,06 à 0,34 bar : 20 x FS, Afin de faciliter l’installation et l’entretien, commandez le collecteur 3 vannes proposé en option. 10 à 25 psi : 10 x FS, 50 psi : 5 x FS, 100 psi : 2.5 x FS ; (côté bas) 2.5 x FS. La prise de prélèvement permet l’élimination totale de l’air dans les tubes et cavités sous pression. Effets Thermiques : (inclus le zéro et l’étendue) ±0.02% FS/°F, de -1 à +65°C. Puissance Requise : de 11 à 30 VDC. Signal en sortie : de 4 à 20 mA, 2 fils. Modèle Description Bar Réf. Réglages du zéro et de l’étendue : Réglables, ±1 mA, non interactif. 645-0 0 à 1 psid 0 à 0,069 DWY26002 Temps de Réponse : de 30 à 50 ms. Résistance de Boucle : de 0 à 1000Q. Connection Electrique : Bloc de jonction avec bande de cloison et conduit de boîtier. 645-1 0 à 2 psid 0 à 0,14 DWY26004 22 mm d’ouverture de diamètre du conduit. Raccord : 1/4”-18 femelle NPT. 645-2 0 à 5 psid 0 à 0,35 DWY26006 Boîtier : Acier inoxydable/aluminium, IP65. Poids : 0.4 kg. 645-3 0 à 10 psid 0 à 0,69 DWY26008 Homologations : CE. 645-4 0 à 25 psid 0 à 1,72 3G-CBM-02202 Collecteur 3 vannes, vannes multiples. Collecteur : Laiton. Type de Valve : 90° on/off. Raccord : 1/4”-18 femelle NPT. 645-5 0 à 50 psid 0 à 3,45 DWY26012 645-6 0 à 100 psid 0 à 6,90 DWY26014 OPTION Pour un certificat d’étalonnage traçable selon les prescriptions NIST, utiliser le code de commande NISTCAL-PT1.

Technical Documents

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

Product Description

The Dwyer 645-4 is a pressure transmitter for industrial process monitoring, offering ±0.25% accuracy and IP65 rating. It handles 0–25 psid with 1/4 inch NPT female connection and 30–50 ms response time, fitting pneumatic and hydraulic control systems.

Frequently Asked Questions

What is the Dwyer 645-4 pressure transmitter used for?

The Dwyer 645-4 is a differential pressure transmitter for industrial process monitoring, including filter status, pump flow control, HVAC systems, and liquid level measurement. It handles gases and liquids compatible with wetted materials, delivering a 4–20 mA output proportional to differential pressure.

What are the specifications of the Dwyer 645-4?

The Dwyer 645-4 offers ±0.25% accuracy, IP65 stainless steel/aluminium housing, 0–25 psid (0–1.72 bar) range, 1/4 inch NPT female connection, 30–50 ms response time, and 0–1000 Ω loop resistance. It requires 11–30 VDC power and has CE approval.

Where to buy the Dwyer 645-4 in Singapore?

3G Electric supplies the Dwyer 645-4 pressure transmitter to Singapore. We handle logistics, customs clearance, and local delivery. Contact our team for pricing and lead time on this SKU (3G-CBM-02202).

How to install the Dwyer 645-4 pressure transmitter?

Mount the Dwyer 645-4 using the 1/4 inch NPT female connections on both high and low pressure ports. Use the bleed screws to vent trapped air. For ease of installation and maintenance, Dwyer recommends an optional 3-valve manifold. Ensure electrical wiring to the terminal block meets 11–30 VDC supply.

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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