Castel Humidity Indicator Ø 18 mm (Models 3940/M18 & 3740/M18)

€57.63

Tax included

€47.63 tax excl.

Calculate Shipping Cost

GDPR Compliance

Protecting your personal data

Shipping policy

Everything about shipping your order

Return policy

all the inns and outs about our return policy

Description

Protect your refrigeration and HVAC equipment from moisture buildup with the Castel Ø 18 mm Humidity Indicator. When moisture enters the system, the indicator shifts from blue to pink/red, providing an immediate visual alert for timely maintenance.

Instant Color Change: Clear visual alert when moisture is detected.
Ø 18 mm Standard Thread: Fits seamlessly into standard refrigerant lines.
Durable Brass Body: Corrosion-resistant construction for longevity.
Model Fit: Compatible with Castel 3940/M18 & 3740/M18.

Rely on Castel’s precision-engineered humidity indicators to streamline maintenance and extend equipment life—order yours today.

Looking for similar items or different specifications for this Castel Humidity Indicator Ø 18 mm (Models 3940/M18 & 3740/M18)?
Explore our full range in the Horeca, Refrigeration Fittings categories

* This part is compatible to the original part number. Part numbers are always leading.

Details

Brand Castel

Reference 59-161-3201023

Data sheet

Brand: Castel
Type: Compatible (non-original)

Review

Comments (0)

No customer reviews for the moment.

8 other product

Castel Nut 3/8″ SAE Ø 8 mm (Model 7030/3M8)

Ensure secure, leak-proof connections in your refrigeration and HVAC systems with the Castel Nut 3/8″ SAE, featuring a precise Ø 8 mm internal thread. Crafted from high-grade brass and finished for corrosion resistance, this nut provides dependable performance under demanding conditions. Precision Machining: Ensures a tight, leak-proof seal every time....

€2.24

Quick-view

Castel Blind Nut ¼″ SAE (Pack of 5)

Seal off unused service ports and fittings in your refrigeration and HVAC systems with the Castel Blind Nut ¼″ SAE. Sold in packs of five, these brass blind nuts provide a reliable, leak-proof barrier against moisture and contaminants. ¼″ SAE Thread: Standard size for universal compatibility. Pack of 5 Nuts: Ample quantity for...

€10.98

Quick-view

Castel Nut 3/8″ SAE Ø 10 mm (Model 7030/3M10)

Maintain secure, leak-free connections in your refrigeration and HVAC systems with the Castel Nut 3/8″ SAE, featuring a precise Ø 10 mm internal thread. Crafted from high-grade brass and finished for corrosion resistance, this nut provides dependable performance under demanding conditions. Precision Machining: Ensures a tight,...

€2.24

Quick-view

Castel Nut 1/2″ SAE Ø 12 mm (Model 7030/4M12)

Achieve secure, leak-free connections in refrigeration and HVAC systems with the Castel 1/2″ SAE Nut, featuring a precise Ø 12 mm internal thread. Engineered from high-quality brass with a corrosion-resistant finish, this nut provides dependable performance under demanding conditions. Precision Machining: Ensures a tight, leak-proof...

€2.85

Quick-view

Castel Double Swivel Sleeve US4-6 3/8″ SAE

Achieve hassle-free hose and tube routing in your refrigeration and HVAC systems with the Castel Double Swivel Sleeve US4-6 3/8″ SAE. Featuring two independent swivel ends, this coupling lets you align connections without twisting or stressing lines—ideal for tight or awkward installations. Dual Swivel Ends: Independent 3/8″ SAE...

€12.91

Quick-view

Castel 5/8″ FM SAE Humidity Indicator (Models 3950/55 & 3750/55)

Enhance your HVAC and refrigeration systems with the Castel humidity indicator featuring a 5/8″ FM SAE connection. Designed for fast, reliable moisture detection, this inline device provides clear, color-coded feedback—turning from blue to pink/red—to alert you instantly to moisture ingress. Instant Visual Alerts: Color change from...

€51.43

Quick-view

Nut 5/8" SAE ø 14 mm – Fits Castel 7030/5M14, Olab 31003-04-M14

Nut 5/8" SAE ø 14 mm for Refrigeration – Compatible with Castel and Olab

This 5/8" SAE nut for ø 14 mm copper pipe is designed for secure and robust connections in refrigeration and air conditioning systems. Engineered for high reliability, it is compatible with Castel and Olab reference codes and is suitable for use with a wide range of refrigerants as specified by ASHRAE 34:2019. Features SAE flare: 5/8" Copper pipe...

€6.06

Quick-view

Castel Humidity Indicator ½″ MM SAE – Models 3910/44 & 3710/44

Castel Humidity Indicator ½″ MM SAE (3910/44 & 3710/44)

Ensure the health of your refrigeration and HVAC systems with the Castel ½″ MM SAE Humidity Indicator. This inline device provides instant, color-coded feedback—shifting from blue to pink/red—to alert you to moisture ingress before it causes damage. Compatible with Castel models 3910/44 and 3710/44, its robust brass body and standard MM SAE...

€23.78

Quick-view

join our Newsletter now

You may unsubscribe at any moment. For that purpose, please find our contact info in the legal notice.

contact info

Brooks Parts
H.R. Holsterf 288
3315TK Dordrecht
Netherlands
(no visiting adress)
info@brooksespressomachines.com

Products

Our company

Your account

This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.

More information Customize cookies

Functional cookies

Yes

Description and cookies

Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.


PHP_SESSID	brooks-parts.com	The PHPSESSID cookie is native to PHP and allows websites to store serialised status data. On the website it is used to establish a user session and to pass state data through a temporary cookie, which is commonly known as a session cookie. These Cookies will only remain on your computer until you close your browser.	Session
PrestaShop-#	brooks-parts.com	This is a cookie used by Prestashop to store information and keep the user's session open. It stores information such as currency, language, customer ID, among other data necessary for the proper functioning of the shop.	480 hours

Advertising Cookies

Yes

Description

These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.

Analytics cookies

Yes

Description

Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.

Performance cookies

Yes

Description

These are used to improve the browsing experience and optimize the operation of the shop.

Other cookies

Yes

Description

These are cookies without a clear purpose or those that we are still in the process of classifying.