ABB 1SVR730850R0200 Liquid Level Monitoring Relay - UL/CSA B300
Part Number: 1SVR730850R0200
Quick Summary
Liquid level monitoring relay from ABB provides precise level sensing for pumping and tank overflow protection in conductive fluid systems. This device monitors with adjustable sensitivity and engages a SPDT output to stop a pump or trigger alarms, reducing run-dry conditions and spill risks. It carries CE, UKCA, and UL/CSA certifications, and is designed for rugged industrial environments with IP50 housing and 85.6 mm height for DIN-rail mounting. The CM-ENS.21S family features multiple electrodes, front-face potentiometers for easy setup, and a sealable cover to prevent tampering. For automation projects, it integrates with 24-240 V AC/DC supply and screw-terminal connections, enabling quick installation and predictable maintenance while supporting compliance and traceability.
Product Information
Extended Description
1SVR730850R0200 ABB: The CM-ENS.21S belongs to the CM liquid level monitoring relay range. It operates with a rated control supply voltage of 24 - 240 V AC/DC and has a 1 c/o (SPDT) output with contacts rated at 250 V / 4 A. It monitors liquid levels of conductive fluids and protects pumps against dry running or tanks against overflow. The working principle as well as the sensitivity can be selected via front-face potentiometers. Several electrodes and a sealable transparent cover for protection against unauthorized changes are available as accessory. The device offers screw connection technology with double-chamber cage connection terminals.
EAN
4013614502927
Minimum Order Quantity
1 piece
Customs Tariff Number
85364900
Data Sheet, Technical Information
Data sheet - Liquid level monitoring relays CM-ENS.2x
Instructions and Manuals
Instruction sheet - CM-ENS.xxx Liquid level monitoring relays | Installation instructions - CM-ENS.xxx Liquid level monitoring relays
CAD Dimensional Drawing
Information - 2D and 3D files for CAD systems
Product Net Width
22.5 mm
Product Net Height
85.6 mm
Product Net Depth / Length
103.7 mm
Product Net Weight
0.125 kg
Function
Filling or draining monitoring
Number of Electrodes
3
Measuring Range
0 | 1 ... 1000 kΩ
Rated Control Supply Voltage (Us)
24 ... 240 V AC/DC
Rated Frequency (f)
Supply Circuit 50/60 Hz
Output
1 c/o (SPDT) contact
Terminal Type
Screw Terminals
Rated Operational Current AC-12 (Ie)
(230 V) 4 A
Rated Operational Current AC-15 (Ie)
(230 V) 3 A
Rated Operational Current DC-12 (Ie)
(24 V) 4 A
Rated Operational Current DC-13 (Ie)
(24 V) 2 A
Minimum Switching Capacity
12 V | 10 mA
Rated Impulse Withstand Voltage (Uimp)
Measuring Circuit / Output Circuit 4 kV | Output Circuit 1 / Output Circuit 2 4 kV | Supply Circuit / Measuring Circuit 4 kV | Supply Circuit / Output Circuit 4 kV
Rated Insulation Voltage (Ui)
Measuring Circuit / Output Circuit 300 V | Output Circuit 1 / Output Circuit 2 300 V | Supply Circuit / Measuring Circuit 300 V | Supply Circuit / Output Circuit 300 V
Degree of Protection
Housing IP50 | Terminals IP20
Overvoltage Category
III
Pollution Degree
3
Short-Circuit Protective Devices
Output Circuit NC - F Type Fuses 6 A | Output Circuit NO - F Type Fuses 10 A
Electrical Durability
AC-12 100000 cycle
Mechanical Durability
Nr. Operations 1000000 cycle
Connecting Capacity
Flexible with Ferrule 1x 0.5 ... 2.5 mm² | Flexible with Ferrule 2x 0.5 ... 1.5 mm² | Flexible with Insulated Ferrule 1x 0.5 ... 2.5 mm² | Flexible with Insulated Ferrule 2x 0.5 ... 1.5 mm² | Flexible 1x 0.5 ... 2.5 mm² | Flexible 2x 0.5 ... 1.5 mm² | Rigid 1x 0.5 ... 4 mm² | Rigid 2x 0.5 ... 2.5 mm²
Tightening Torque
0.6 ... 0.8 N·m | Control Circuit 0.9 N·m | Main Circuit 1 N·m
Wire Stripping Length
8 mm | Main Circuit 10 mm
Recommended Screw Driver
0.8 x 4 | 4.5 | Pozidriv 1
Mounting Position
1 ... 5 | 1 ... 6
Mounting on DIN Rail
TH35-15 (35 x 15 mm Mounting Rail) acc. to IEC 60715 | TH35-7.5 (35 x 7.5 mm Mounting Rail) acc. to IEC 60715
Standards
CAN/CSA C22.2 No.14 | IEC/EN 63000 | IEC/EN 60255-27 | IEC/EN 61000-6-2 | IEC/EN 61000-6-3 | UL 508
Maximum Operating Voltage UL/CSA
Output Circuit 300 V AC
Contact Rating UL/CSA
B300
Connecting Capacity UL/CSA
Flexible 1x 18-14 AWG | Flexible 2x 18-16 AWG | Rigid 1x 20-12 AWG | Rigid 2x 20-14 AWG
Tightening Torque UL/CSA
7.08 in·lb
Pilot Duty UL/CSA
B300
Ambient Air Temperature
Operation -25 ... +60 °C | Storage -40 ... +85 °C
Maximum Operating Altitude Permissible
Without Derating 2000 m
Conflict Minerals Reporting Template (CMRT)
CMRT - Conflict Minerals Reporting Template
REACH Declaration
REACh Info for Electronic Relays and Controls
RoHS Information
RoHS Declaration of conformity for Electronic Relays and Controls
RoHS Status
Following EU Directive 2011/65/EU and Amendment 2015/863 July 22, 2019
SCIP
8eb6fdcd-73c5-4ba0-b3a1-9e5817ec884e Germany (DE)
Simplified SCIP
76258664-4ddd-4466-b2c5-48f1c81ca946 Netherlands (NL) | 26ab315d-e5da-4ab6-8c33-ab7f38c90975 Hungary (HU) | fe68a77a-8670-4b59-8555-b95bd9824d7a Greece (GR) | e8f2294c-dbbc-4561-9c78-4314def99756 Portugal (PT) | cbdbf5ed-7133-47ec-8651-a9f37a9066f9 Bulgaria (BG) | eb40b6c8-0a1c-46a2-91bb-496e70639147 Poland (PL) | c2f2bb05-9e30-4336-aa89-f69f95fa56cd Poland (PL) | 49d8b886-023e-4bc2-a01d-558931ab2346 Denmark (DK) | b9de77df-1f6c-4e41-b708-281b213082d9 Germany (DE) | 4976fb04-fd79-4e27-8b32-21e435792153 Czech Republic (CZ) | 0518aaac-b252-43b3-aef0-d1e99ab14fc9 Belgium (BE) | bee4938e-7679-4452-bf30-5f5a2792318e Germany (DE) | 40185897-a424-4a5e-ba3d-0bf682672898 Italy (IT) | 061ab983-5115-446e-9255-170942d4fa96 Finland (FI) | 2a626756-2bd1-4ec4-b6b3-bfc9c5bc5efb Germany (DE) | 89a45059-804a-4ced-a2da-ceb086ce357d Poland (PL) | 752e6fb7-11bc-4ae9-90ab-f7d8a804b173 Norway (NO) | 8b4adfc1-4dda-4d0e-b0a9-b43ceb4dafc9 Spain (ES) | 17538767-09fa-4021-9a76-16288c957ce6 Belgium (BE) | ef12d084-5e34-46b2-bb21-25d06d85bd82 Hungary (HU) | 8cc851ab-76f8-4af2-9885-89f38ddef669 Sweden (SE) | 10874a15-4eaf-4eee-a33d-285d212712ae Sweden (SE) | 8569279f-c350-4786-8f4f-be4bf9579b5a Germany (DE) | 3ef8264d-6856-4261-8eb5-dc14f460f435 France (FR) | e8bcdcc0-7cf8-45ba-bcd6-5b25da0b21f4 France (FR) | 6898e71a-1007-4d40-a606-fdfc6a7e922c Estonia (EE) | baddfe5a-b431-4ec2-bb27-0906c4b8c466 Croatia (HR)
Toxic Substances Control Act - TSCA
Toxic Substances Control Act (TSCA) declaration for Electronic Relays and Controls
CQC Certificate
CQC Certificate, Liquid Level Monitoring Relays, CM-ENS.xxx, Made in Germany
cULus Certificate
cULus508_20150627-E140448
Declaration of Conformity - CCC
CCC Declaration of Conformity, Liquid Level Monitoring Relays, CM-ENS.xxx, Made in Germany
Declaration of Conformity - CE
EU Declaration of Conformity - CM-ENS.xxx Liquid level monitoring relay
Declaration of Conformity - UKCA
UK Declaration of Conformity - CM-ENS.xxx Liquid level monitoring relay
DNV GL Certificate
DNV GL Certificate - CM-ENS.xxx Liquid level monitoring relays
Package Level 1 Units
box 1 piece
Package Level 1 Width
97 mm
Package Level 1 Depth / Length
30 mm
Package Level 1 Height
109 mm
Package Level 1 Gross Weight
0.15 kg
Package Level 1 EAN
4013614502927
Object Classification Code
B
ETIM 7
EC001447 - (Fill) level monitoring relay
ETIM 8
EC001447 - (Fill) level monitoring relay
ETIM 9
EC001447 - (Fill) level monitoring relay
eClass
V11.0 : 27371813
UNSPSC
39122331
E-Number (Finland)
2712567
E-Number (Norway)
4189434
Adjustable sensitivity through front-face potentiometers enables precise threshold tuning for diverse liquids, reducing false trips and extending pump life. This directly lowers maintenance costs and downtime in process lines where conductive fluids vary by composition. The three-electrode sensing with a single SPDT output supports flexible control schemes, allowing seamless integration with PLCs, alarms, or remote signaling for proactive management of tank levels. Wiring is simplified by screw terminals and double-chamber cage connections, which improves reliability and speeds field installation while minimizing operator error. A compact DIN-rail footprint and TH35 mounting compatibility enable quick panel integration in control cabinets, saving space and improving serviceability. Wide U s operation from 24 to 240 V AC/DC and 50/60 Hz compatibility reduces inventory needs and increases system versatility across facilities. Built-in protections and certified standards ensure regulatory compliance and safer operations in harsh environments.
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FAQs
Mount the CM-ENS.21S on a TH35 DIN rail (TH35-15 or TH35-7.5). Use the screw terminals for all connections, with flexible or rigid conductors in the ranges specified (0.5 to 2.5 mm² flexible, 0.5 to 4 mm² rigid). Ensure the sealable cover is closed to prevent tampering and verify pairings with the SPDT output for your pump or alarm circuit.
Key specs include a rated control supply voltage of 24 to 240 V AC/DC, a measuring range of 0 to 1000 kΩ, and a 1 c/o SPDT output. It supports 50/60 Hz, with AC-12 current up to 4 A and DC-12 up to 4 A at 24 V, enabling reliable pump protection and level monitoring across common industrial control schemes.
Yes. It provides dry-run protection and overflow prevention by monitoring conductive fluid levels using three electrodes and adjustable sensitivity. Its SPDT output can shut down pumps or trigger alarms, reducing downtime and water or product loss in tanks and processing lines.
The device carries CE, UKCA, UL/CSA approvals, and declarations including DoC for CM-ENS.xxx. It also aligns with IEC/EN standards such as 61000-6-2 and 61000-6-3, UL 508, and others, ensuring regulatory compliance across regions and safer operation in industrial environments.
Install with the double-chamber cage terminals and screw connections for secure wiring, use the front-face potentiometers for quick setup, and fit a sealable cover to prevent tampering. This approach reduces maintenance, minimizes false tripping, and extends equipment life, delivering measurable ROIs in process or water-treatment facilities.