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Grundfos ALR 20/A Ex Leakage Sensor Relay

GRUNDFOS · LEAKAGE MONITORING · AL05 EX

Grundfos ALR 20/A Ex is the leakage-sensor relay specified for use only with AL05 Ex. Install the non-Ex relay outside the hazardous area in a minimum-IP54 cabinet and verify electrical ratings, TS 35 mounting and clearance.

TYPE DESIGNATIONALR 20/A Ex
MATCHED SENSORAL05 Ex only
INSTALLATIONOutside hazardous area
MAX AMBIENT40 °C
Order check: match ALR 20/A Ex with AL05 Ex; verify relay ratings, cabinet IP54 protection, TS 35 mounting and hazardous-area separation.◆ One Year Warranty   ◆ Fast Delivery   ◆ Worldwide Shipping
  • Worldwide delivery
  • Delivery from stock
  • In stock really means in stock
  • No account required
  • Shipped from the China
Product Specifications
Manufacturer Grundfos Holding A/S
Item number ALR 20/A Ex
Country of Origin Denmark
Lead Time 2-3 DAYS
After-Sales Support For after-sales support, please contact May.
HS Code / Commodity code Please confirm the destination before shipping.
FAQ

Quotes are valid for 30 days from the day the quote is received unless stated otherwise at the time of quotation.

Yes,we offer one year warranty for all new products.

Yes. We worked with FEDEX/DHL/TNT/UPS/ allowing us to provide swift global delivery of parts to any corner of the world.

Normally 3-5 working days,some remote areas 5-7 days more.

Product information
01 · LEAKAGE RELAY IDENTITY & SAFETY LIMITS

Reference-level checks for Grundfos ALR 20/A Ex.

A model-specific view of the leakage-sensor relay, its required AL05 Ex sensor relationship and the installation limits published by Grundfos.

TYPE DESIGNATIONALR 20/A Ex
MATCHED SENSORAL05 Ex
HARDWARE ROLELeakage sensor relay
LIFECYCLE SIGNALConfirm by quotation
PUBLISHED GRUNDFOS INSTALLATION DATA

Hazardous-area and relay checkpoints

Keep the relay outside the hazardous area
SENSOR COMPATIBILITYOnly with AL05 Ex
RELAY LOCATIONOutside hazardous area
CABINET PROTECTIONMinimum IP54
MAX AMBIENT40 °C
RAIL MOUNTINGTS 35
CLEARANCE10 mm
SUPPLY RATING230 VAC, 50 to 60 Hz, 4 VA
RELAY CONTACT RATING250 V / 100 VA / 5 A max.
Identification boundary

Grundfos identifies ALR 20/A Ex as the relay used only with the AL05 Ex leakage sensor. The relay itself is not explosion protected.

Safety boundary

Install the relay outside the hazardous area in a control cabinet with at least IP54 protection, observe the 40 °C ambient limit, TS 35 mounting and 10 mm clearance.

02 · HAZARDOUS-AREA & SENSOR DECISIONS

Keep ALR 20/A Ex and AL05 Ex roles clearly separated.

System safety depends on using the specified leakage sensor, locating the relay outside the hazardous area and following cabinet, temperature, spacing and electrical ratings.

SENSOR RELATIONSHIP

Only with AL05 Ex

Grundfos states that ALR 20/A Ex may only be operated with the AL05 Ex leakage sensor. Confirm the complete sensor cable and installed detection point.

INSTALLATION LOCATION

Non-Ex relay in an IP54 cabinet

The ALR 20/A Ex relay is not explosion protected and must be installed outside the hazardous area in a control cabinet with minimum IP54 protection.

LEAKAGE MONITORING REPLACEMENT CHECK
01 / IDENTIFYIdentify relay and sensor

Record ALR 20/A Ex, AL05 Ex, relay ratings, sensor cable, terminal wiring and installed hazardous-zone boundary.

02 / VERIFYVerify cabinet conditions

Confirm the relay is outside the hazardous area, ambient is no more than 40 °C, the cabinet is at least IP54 and 10 mm clearance is available.

03 / SELECTFunction-test the alarm path

Mount on TS 35, wire to the official diagram and test leakage detection, relay output and downstream alarm or shutdown logic.

Do not place the ALR 20/A Ex relay inside a hazardous area and do not connect an unapproved leakage sensor in place of AL05 Ex.

Replacement rule: A different sensor relay is not an automatic substitute for Grundfos ALR 20/A Ex because hazardous-area separation, sensor compatibility and contact ratings must be preserved.

03 · FAQ

Procurement answers for Grundfos ALR 20/A Ex.

sensor match · hazardous area · cabinet · relay rating · supply
01

Which leakage sensor can be connected to Grundfos ALR 20/A Ex?

Grundfos states that ALR 20/A Ex may only be operated with the AL05 Ex leakage sensor. Do not substitute another sensor without written engineering approval.

02

Can Grundfos ALR 20/A Ex be installed inside a hazardous area?

No. Grundfos states that the relay is not explosion protected and must be installed outside the hazardous area.

03

What control-cabinet conditions apply to Grundfos ALR 20/A Ex?

Use a cabinet with at least IP54 protection, keep ambient temperature at or below 40 °C, mount on TS 35 rail and maintain 10 mm clearance.

04

What electrical ratings are shown for Grundfos ALR 20/A Ex?

The manufacturer documentation lists 230 VAC at 50 to 60 Hz, 4 VA, and a relay contact maximum of 250 V, 100 VA or 5 A. Verify the unit label before wiring.

05

How should replacement availability for Grundfos ALR 20/A Ex be requested?

Ask for written confirmation of matching AL05 Ex compatibility, condition, quantity, warranty and the fixed 2-3 DAYS lead time.

06

Which documents and installation details are needed to quote Grundfos ALR 20/A Ex?

Use the official Grundfos instructions and send relay and AL05 Ex photos, wiring diagram, cabinet rating, hazardous-zone arrangement, quantity, destination and required date.

04 · Transaction Cases

Sincere Cooperation, Long-Term Trust

01Russia

A Russian customer urgently needed a replacement for a discontinued automation component. After reviewing the product label, technical parameters, and application details, our engineers recommended a compatible alternative and provided photos and test videos before shipment. The alternative performed well, enhancing the customer's confidence in our technical capabilities and leading to multiple repeat orders.

02India

An Indian customer still had doubts after initial online communication with us, so they visited our company in person for a face-to-face meeting and product inspection. This visit increased the customer's trust and led to the successful placement of their first order. Over the next few years, we completed multiple orders and established a stable, long-term partnership.

03Venezuela

A Venezuelan customer needed a specific automation component and compared products and services from several suppliers online. After nearly three weeks of careful consideration, our sincere communication, professional service, and reliable product quality won the customer's trust. After receiving the product and using it for several weeks without any problems, the customer gave us positive feedback and subsequently placed multiple orders.

 
05 · After-Sales Support

Support designed around continuity.

Priority lane
Fast Response

We understand the importance of minimizing equipment downtime. Our team responds promptly to inquiries and provides professional assistance with product information, quotations, order status, shipping, and after-sales questions.

Warranty Support

Most products are covered by a warranty of up to 12 months, subject to the applicable terms and conditions. If any product-related issue occurs during the warranty period, our team will assist you and provide an appropriate solution.

Technical Documentation

Relevant datasheets and technical literature can be provided with the goods, offering useful information for product identification, installation, operation, and maintenance.

Global Customer Service

We serve customers worldwide and provide reliable assistance from inquiry to delivery and after-sales service, ensuring clear and timely communication throughout the process.

Long-term Spare Parts Supply

We continue to source discontinued, obsolete, and hard-to-find automation parts from various brands, helping customers maintain existing equipment and reduce downtime caused by spare parts shortages.

06 · Mixed model reference

Mixed specialty automation models.

Document-selected model references arranged as a deliberately mixed field.

012711-T5A16L1
02501EN , 500495
03UDA2182-CC1-NN2-NN-N-0E00
04MC3190-RL3S24E0A
05CNC-61 0610520OC110043H
06HES92020 R7
07PR 4104
085WG1535-1DB31
09C819G-4G-GA-K9 V01-819-4G
10ADV151-P50
11MTC6
12AC511 0MN008
13RJ45 CPAC-4-1C-LV:1.3
140N-10168 J5-S
15DIA-2Q -352
16Nevada 3500 125840-01
17TSXCDP303
18IO-35G01476-01
19Bticino 352400
20YTA 110
219253C25G04
22liob-585
23VIS1040-S940
24GJR2254000R1 DC373B-E 8017/018
25LNL-MT15-485
26PS236 242820900017
27855W-G20Y3Y4
28QTERM-N15
29RDL512LF/64V
307800IDA2Q-3G 3G/HD/SD-SDI
31CP-3110
32XB15/PX869402
33WLTM-50
34K1677
35CPG1000-BEL-AJZZZ3-Z
36SDL200
37N200/SA-2 110-240VAC
38AAM11-S2
39571125022 I4DVW-0000
Request a quote

Ask about Grundfos ALR 20/A Ex.

Send ALR 20/A Ex and AL05 Ex labels, wiring and cabinet details, quantity, destination and required date for a clear reply.

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