Input device monitoring

Is there a device to monitor dry contacts of other relays, switches?
want to monitor a contact closure.

Hi, I have the same request. Is there a device to control one or more (2-4) digital input?
Thanks for reply

You can use a Sonoff Mini that sense using low voltage (3.3V) or Dual R3 that has 2 inputs, but requiere live mains to sense those inputs.

Would be nice to have the capability to have dry contact input device or update firmware and ewelink support of the extra input on the SONOFF SV Safe Voltage WiFi Wireless Switch.