Knowledge Base  /  Frequently Asked Questions  /  Room Alert

Overview Of AVTECH Sensor Types

AVTECH offers several types of sensors: digital, switch, analog, relay and wireless (legacy). Please select the tab below for an explanation of each type of sensor.

Digital SensorsSwitch SensorsAnalog SensorsRelaysWireless Sensors (Legacy)

Digital sensors provide real-time numeric readings of environmental conditions.

Temperature & Humidity Sensor

Digital sensor readings

Numeric

Digital sensors provide real-time numeric readings of the environment, such as:

– The temperature in Fahrenheit or Celsius

– The relative humidity (RH) as a percentage

– The heat index (feels-like temperature) in Fahrenheit or Celsius

Here you see the readings from AVTECH’s Digital Temperature & Humidity Sensor as displayed in a Room Alert Monitor’s web interface.

You may also view these readings in your account at RoomAlert.com and our Device ManageR software.

Connecting digital sensors to Room Alert

RJ-11 Cables

External digital sensors connect to Room Alert via RJ-11 cables.

RJ-11 Ports

The RJ-11 cables plug directly into Room Alert’s RJ-11 ports.

 

For more information

Visit the product pages of our most popular digital sensors

Digital Temperature Sensor

Digital Temperature & Humidity Sensor

Check out these resources

Please see our Sensors page for a complete list of the digital sensors AVTECH offers.

You may also find our digital sensor installation notes on our Product Manuals & Installation Notes page.

Switch sensors read as open or closed depending on environmental conditions.

Flood Sensor – Spot

Switch sensor readings

Open/Closed

Switch sensors have an internal circuit that opens or closes based on environmental conditions. Switch sensors therefore do not provide numeric values; instead, they read as one of those two circuit states: Open or Closed.

For example, when the Flood Sensor – Spot detects water, its state is Open (alarm). When the Flood Sensor – Spot is dry, its state is Closed (normal).

Here you see the reading of the normal state from AVTECH’s Flood Sensor – Spot displayed in a Room Alert Monitor’s web interface.

You may also view these readings in your account at RoomAlert.com and our Device ManageR software.

Connecting switch sensors to Room Alert

Switch sensor cable

External switch sensors connect to Room Alert via low-voltage two-wire cable, such as speaker wire. Switch sensor cable is not polarized.

Switch sensor ports

The non-polarized speaker wire connects to Room Alert’s switch ports. Switch ports are either screw-connector type or push-button type.

For more information

Visit the product pages of our most popular switch sensors

Power Sensor

– Flood Sensor (Cable or Spot)

Smoke Sensor

Room Entry Sensor

– Air Flow Sensor (Normally Open or Normally Closed)

Check out these resources

Please see our Sensors page for a complete list of the switch sensors AVTECH offers.

You may also find our switch sensor installation notes on our Product Manuals & Installation Notes page.

0 to 5VDC analog sensors provide voltage readings that Room Alert converts to custom scales.

Current Loop

Analog sensor readings

Numeric (voltage and custom scale)

0 to 5VDC analog sensors provide numeric voltage values; Room Alert then converts these voltages to your custom-entered numeric scale, such as amperage or Fahrenheit.

Here you see a raw voltage and custom amperage reading from AVTECH’s Current Loop 1 as displayed in a Room Alert Monitor’s web interface.

You may also view these readings in your account at RoomAlert.com  and our Device ManageR software.

Connecting analog sensors to Room Alert

Analog sensor cable

0 – 5VDC analog sensors connect to Room Alert via low-voltage two-wire cable, such as speaker wire.

Analog sensor cable is polarized (+/-).

Analog sensor port

The polarized speaker wire connects to an analog port. You can find analog ports on the Digital Temperature & Analog Sensor (compatible with Room Alert 32E, 12E, 4E or 3E) and on the back of Room Alert 32E and 12E.

Analog ports are either screw-connector type or push-button type.

For more information

Visit the product pages of our most popular analog sensors

Current Loop 1

Current Loop 2

Check out these resources

Please see our Sensors page for a complete list of the analog sensors AVTECH offers.

You may also find our analog sensor installation notes on our Product Manuals & Installation Notes page.

Relays turn electrical devices on and off in response to alert conditions.

Relay Switch

Relay readings

On / Off

Relays can turn electrical devices like fans on or off by toggling a switch that controls power running to the device. Relay readings display in the Room Alert Monitor’s web interface as either On or Off.

Here you see the On / Off readings from AVTECH’s Relay Switch as displayed in a Room Alert Monitor’s web interface.

You may also view these readings in your account at RoomAlert.com and our Device ManageR software.

Connecting the Relay Switch to Room Alert

Custom cord

The Relay Switch has a custom cord that connects to the Light Tower & Relay Adapter (LTA). This adapter then connects the Relay Switch to the Room Alert 32E, 12E or 3E.

The Relay Switch’s custom cord also connects directly the Room Alert 4E.

Custom port

The LTA and the Room Alert 4E have a custom port that accepts the Relay Switch’s custom cord.

Connecting relays to your electrical device

Relay output cable

The wire or cable you use to connect the Relay Switch (or the Room Alert 32E and 12E built-in relay output ports) to your electrical device must be appropriate for your device; consult an electrician if you are unsure if the wire is compatible with the electrical load or device.

Depending on your device’s electrical load, you may need a 3rd-party relay between your device and AVTECH’s Relay Switch (or the Room Alert 32E and 12E built-in relay output ports). In that case, AVTECH’s Relay Switch or Room Alert toggles the 3rd-party relay, and the 3rd-party relay toggles your device.

Relay output port

Relay output ports are either screw-connector type or push-button type.

For more information

Visit the Relay Switch’s product page for more information.

You may also refer to the Relay Switch’s Installation Note.

Wireless Sensor Hubs (legacy) transmit connected sensor data to legacy model Room Alert 32W wirelessly.

WiSH Sensor (Legacy)

Wireless Sensor Hub readings

Legacy WiSH and WiSPR sensors transmit readings for the digital and switch sensors connected to them. They have 1 internal digital temperature sensor and can take up to 3 external sensors: 2 digital sensors and 1 switch sensor.

To the right, you see a WiSH sensor’s readings as displayed in a legacy model Room Alert 32W’s web interface. This WiSH has the Digital Temperature Sensor, Digital Temperature & Humidity Sensor and Room Entry sensor connected.

Connecting Wireless Sensor Hubs to legacy model Room Alert 32W

To connect your Wireless Sensor Hub to legacy model Room Alert 32W (or legacy model Room Alert 26W), locate the hub up to 250′ away and connect it to power. It will begin wirelessly transmitting sensor data every 150 seconds via a secure, private protocol on a ZigBee-based 2.4 GHz connection.

The WiSH / WiSPR sensor’s Installation Note contains best practices for positioning your Wireless Sensor Hub.

For more information

Refer to the WiSH and WiSPR’s Installation Note.

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