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

3G Electric
Image not available
Fantini CosmiSwitches & Thermostats

Fantini Cosmi Immersion aquastat external adjustment 10/90°C C03A3

Fantini Cosmi C03A3 immersion aquastat with external adjustment for heating systems, offering 10–90°C range and ±3°C calibration accuracy. Features GC 1/2 PN10 immersion thread and 6±1°C differential, suitable for…

SKU 3G-CBM-03581

Brand
Fantini Cosmi
Item
Immersion aquastat external adjustment 10/90°C C03A3
Part Number
C03A3
Category
Switches & Thermostats
UNSPSC
39122229 — Temperature switch
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

Fantini Cosmi
Manufacturer Part Number
C03A3
model
C03A3RI
differential c
6±1
immersion thread
GC 1/2 PN10
protection level
IP40
temperature range c
10 ÷ 90
calibration accuracy c
±3
maximum bulb temperature c
150

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

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

Product Description

Fantini Cosmi C03A3 immersion aquastat with external adjustment for heating systems, offering 10–90°C range and ±3°C calibration accuracy. Features GC 1/2 PN10 immersion thread and 6±1°C differential, suitable for boiler and hydronic applications.

Frequently Asked Questions

What is the Fantini Cosmi C03A3 immersion aquastat used for?

The Fantini Cosmi C03A3 immersion aquastat is used for temperature control in boilers, heating systems, circulation pumps, burners, and air heaters. It mounts directly on a pipeline via a GC 1/2 PN10 threaded sheath, sensing liquid temperature to open or close electrical contacts.

What are the specifications of the Fantini Cosmi C03A3 immersion aquastat?

The Fantini Cosmi C03A3 has a temperature range of 10 to 90 °C, a differential of 6±1 °C, and calibration accuracy of ±3 °C. It features a GC 1/2 PN10 immersion thread, IP40 protection, and a maximum bulb temperature of 150 °C. Electrical rating is 15(6) A at 250 V~.

Where to buy the Fantini Cosmi C03A3 in Singapore?

3G Electric supplies the Fantini Cosmi C03A3 immersion aquastat to Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact our team for pricing and lead time on this SKU 3G-CBM-03581.

How to install the Fantini Cosmi C03A3 immersion aquastat?

Install the Fantini Cosmi C03A3 by immersing the bulb directly into the controlled liquid through the supplied GC 1/2 PN10 threaded sheath. Ensure the body temperature does not exceed 120 °C. Use the PVC cable gland for electrical connections, following the wiring diagram for normally open or closed contacts.

Used in

Common applications for Fantini Cosmi
HVAC systems — Fantini Cosmi B12ANY pressure switch for negative pressure monitoring in ventilation ducts
Steam generation — B12MN pressure switch with manual reset for steam boiler safety circuits
Pneumatic control — B01A pressure switch for air pressure monitoring in industrial automation
Hydraulic systems — B12BNY pressure switch with metallic diaphragm for hydraulic pressure sensing
Water treatment — B12ERNY pressure switch for high-pressure filtration and reverse osmosis units
Process control — B01B pressure switch for monitoring inert gas pressures in chemical plants
Not sure this is the right part? Photo-identify it

Fantini Cosmi Products

3G Electric supplies Fantini Cosmi switches & thermostats. 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
Fantini Cosmi
Fantini Cosmi
Immersion aquastat external adjustment 40/120°C C03B3
Fantini Cosmi
Fantini Cosmi
Immersion aquastat fixed setting 100°C C06A3M
Thermostat -20/40°C IP65 Capillary 1.5 m C04C2Y
Fantini Cosmi
Thermostat -20/40°C IP65 Capillary 1.5 m C04C2Y
Fantini Cosmi
Fantini Cosmi
Stainless steel float EAD01
Immersed water level regulator A95AS3 (neoprene)
Fantini Cosmi
Immersed water level regulator A95AS3 (neoprene)
Ambient thermostat with vapor tension C16I
Fantini Cosmi
Ambient thermostat with vapor tension C16I

More from Fantini Cosmi

View all Fantini Cosmi parts
Air flow controller FF71A
Fantini Cosmi
Air flow controller FF71A
Fantini Cosmi
Fantini Cosmi
Branching box KBE3
Immersed level regulator water A95BS5 (neoprene)
Fantini Cosmi
Immersed level regulator water A95BS5 (neoprene)
Fantini Cosmi
Fantini Cosmi
Room thermostat CH111 silver
Ambient thermostat CH115RF white
Fantini Cosmi
Ambient thermostat CH115RF white
B12GMN 25-150 bar adjustment pressure switch
Fantini Cosmi
B12GMN 25-150 bar adjustment pressure switch
Room thermostat fan coil C61 (fan coil)
Fantini Cosmi
Room thermostat fan coil C61 (fan coil)
Room thermostat with vapor tension C16EHL
Fantini Cosmi
Room thermostat with vapor tension C16EHL

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first