EN 656.1 Fluid Level Indicators Plastic, with Electrical Fluid Level Monitoring, Lateral Plug


EN 656.1 Plastic Fluid Level Indicators, with Electrical Fluid Level Monitoring, Lateral Plug
ELESA original design
code: HCV-E

Product description


With fluid level indicators EN 656.1, the fluid level can not only be viewed, it can also be monitored using an electric contact.

A float with a magnet is located within the indication range which closes or opens a contact at a certain fluid level (REED switch).

The table values for the maximum allowable pressure are based on the use of mineral oil (according to ISO 3498) at a temperature of 73 °F (23 °C). Use under different conditions will influence the compressive strength and requires prior consultation.


Crystal clear polyamide (PA-T)

  • Aging resistant
  • High mechanical strength
  • Temperature resistant up to 194 °F (90 °C)
  • Solvent resistant,
    but not alcohol resistant
  • Avoid contact with hot water

Contrast screen
White painted aluminum

Plastic (Polyamide PA), black

  • Glass fiber reinforced
  • With built-in magnet

Rubber NBR (Perbunan®)

Set screw, hex nut, serrated washer
Steel, zinc plated, blue passivated finish


Technical drawing

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EN 656.1 Plastic Fluid Level Indicators, with Electrical Fluid Level Monitoring, Lateral Plug sketch

Part Options / Table


LSWith normally open contact
LOWith normally closed contact
LWWith change-over contact
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Dimensions in: Inch (change to Metric)
hkl2l3l4l5l6l7l8s ≈
wall thickness
Max. compressive strength
in bar
2.991.20M 100.791.570.791.714.022.090.510.772.170.3118
5.001.20M 121.181.970.793.826.022.480.630.772.170.2418
10.001.20M 121.181.970.798.8211.022.480.510.772.170.2412

Build & Price

3D Product Configurator
Distance of the screws l1

Plug Characteristics


DIN EN 175301-803 Type C

Cable fitting:

PG 7, for a cable diameter of 6 to 7 mm

Cable cross section:

max. 1.5 mm²

Protection class:

IP 65

Notice: Magnetic fields can cause interference!


Fluid Level Monitoring

The fluid level is measured by means of a float with a built-in magnet which opens or closes a contact (REED switch) when the minimum fluid level is reached.

Electrical details

Type LS (Normally open)

Type LO (Normally closed)

Type LW (Changeover contact)

Maximum contact voltage:

140 V AC, 200 V DC

140 V AC, 150 V DC

140 V AC, 150 V DC

Maximum current on contact:

1.2 A

2 A

2 A

Maximum switch capacity:

10 W

20 W

20 W

Operating symbol:

MD656{St:_}SB-41549-0 MD656{St:_}SB-41551-0 MD656{St:_}SB-41553-0

Assembly Instructions for the Cable Connection

  1. Loosen mounting screw and remove connector plug.

  2. Push the contact insert out of the connector housing.

  3. Loosen cable fitting, slip the cable through the connector housing, and connect the wires to the contact insert.

  4. Push the contact insert back into the connector housing in the required position, tighten the cable fitting to relieve strain and to seal the cable.

  5. Push the connector plug onto the contacts of the fluid lever indicator and then secure it with the mounting screw.


Selected Part

Total US Dollars (net)
Call / Email for Delivery Time
Please note our quantity discounts (US Dollars).
≥ 100$92.72
Prop 65: Not compliant
Cancer and Reproductive Harm - www.P65Warnings.ca.gov
RoHS: Compliant
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances)).
Weight: 0.392 lbs
If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 800-877-8351
All Prices are in US Dollars. Taxes Not Included.

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