Dual Alarm Relay

For Level Controls




The Dual Alarm Relay can be used in conjunction with the latching relay

This device connects to -for example - a high a low switch point.

It closes one of its internal relays for active an alarm or shut down a

valve or pump.  It has 2 LEDS for indication.


Can also be used with most any non voltage producing switches.

Hydraulic cylinders  - doors switch - rotating tanks - and more



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SSR500 Dual Contact Relay


  • Sends a safe low voltage signal to the switch

  • Two Internal 240V 5A SPDT Relay

  • Built in power supply

  • DIN rail mount

  • Palm size compact device

  • LED's indicates status

  • Terminal Block - external

  • easy to follow instructions on the top





Looks like this picture

but with 2 LEDs

Design Criteria:


  • Rugged level applications
  • Liquid level High and Low Switches
  • two 240V 5A load
  • PC board design
  • Rugged
  • Compact electronic


The dual alarm relay can be used for high and low alarm controls

or can be used to shut the system down in case of pump or

valve failure.


The device has two independent internal relays that can be control

by most any contacts that do not have voltage.  The SSR500 - sends

a safe low voltage signal to the swicth.



Possible Applications:


  • Cylinder Control
  • Cogeneration
  • Oil level control
  • Roof top day tanks
  • Day tank level
  • Base generator tank
  • Remote cogeneration fuel level
Manual: PDF  - Text

Flyer: PDF - Text

Working Parameters:


Instrument Type

Electromechanical Contact Protection Relay


SSR 500

Housing Size

75mm x 50mm x 100mm

Housing Material

Polyamide 6.6

Supply Voltage

115 VAC +/- 10% 50 60 Hz

Power Consumption

5 VA (typical)

Control Voltage

24 VDC

Control Current

20 Ma


3 SPDT relay contact

Permissible Load

250 VAC / 8A resistive / 1840 VA

Temperature range

-20 deg. C to 60 deg. C

Type of protection

IP 20