Monnit ALTA Wireless Dry Contact Sensor - AA Battery Powered (900 MHz)

The Monnit ALTA Wireless Dry Contact Sensor is a compact, battery-powered solution designed to monitor the closure of an external circuit. Ideal for detecting when two wired contact points come together, this sensor provides timely alerts via SMS text and/or email the moment the contacts touch or a connected switch is triggered. With easy installation, flexible lead length options, and wireless communication at 900 MHz, the ALTA dry contact sensor brings enterprise-grade monitoring to a variety of applications—from industrial equipment safety to asset protection and smart building automation. Built for simple integration with Monnit gateways and the cloud, it helps you safeguard critical assets, reduce downtime, and maintain operations with minimal maintenance.

• Wireless dry contact sensing: Detects closure between two wired contact points, enabling monitoring of switches, contact plates, or any external mechanical switch. When the circuit closes or a switch triggers, the device sends an instantaneous alert to your preferred channels. This enables real-time decision-making and rapid response to events such as door/valve closures, equipment interlocks, or safety interlocks.
• 900 MHz wireless technology: Utilizes a robust, proprietary 900 MHz radio protocol to communicate with Monnit gateways and the cloud. The wireless link is designed for reliable performance across typical industrial and commercial environments, helping minimize missed alerts and ensuring consistent monitoring without wired infrastructure. Range can vary with layout and obstructions, but the architecture is optimized for enterprise-scale deployments.
• AA battery powered and easy to maintain: The sensor is powered by a standard AA battery, delivering long life with minimal maintenance. When battery replacement is needed, the unit is designed for straightforward, tool-free battery access so you can keep downtime to a minimum. The battery-powered form factor is ideal for locations where power outlets are scarce or hard to reach.
• Versatile mounting and lead options: Designed for flexible installation near the monitored contact points. A variety of lead lengths are available to accommodate different installation geometries, allowing you to connect to external switches or contact plates without compromising space or aesthetics. The compact footprint helps the device blend into your environment while delivering reliable sensing.
• Alerts to SMS and Email via Monnit platform: When the dry contact closes, you can configure alerts to be delivered through SMS text message and/or email. This seamless integration with Monnit’s cloud platform enables centralized monitoring, remote management, and easy scalability across multiple sites. Alerts can be tailored to users or roles, and you can set up automated responses or escalation workflows as needed.

Technical Details of Monnit ALTA Wireless Dry Contact Sensor - AA Battery Powered (900 MHz)

• Communication: Wireless at 900 MHz to Monnit gateways and cloud-based monitoring.
• Power: AA battery-powered sensor with field-replaceable battery options.
• Sensor type: Dry contact sensor for detecting closure or opening between two wired contacts.
• Connectivity: Integrates with Monnit gateways and the Monnit cloud for alerts and remote monitoring.
• Lead lengths: Available in multiple lead-length configurations to fit installation requirements.

How to install Monnit ALTA Wireless Dry Contact Sensor

• Step 1: Prepare the sensor by inserting a fresh AA battery, ensuring proper orientation, and powering the device on. Verify the LED indicator (if present) confirms standby mode or pairing status as per the user manual.
• Step 2: Connect the dry contact points to your external switch or contact plate. You will be monitoring the closure between these two points, so ensure the wiring is secure and properly insulated to prevent false triggers and environmental damage.
• Step 3: Mount the sensor in close proximity to the monitored contact area. Use appropriate mounting hardware to secure the device, keeping it out of physical harm and away from harsh vibration or heavy machinery that could compromise the sensing points.
• Step 4: Pair the ALTA sensor with your Monnit gateway. Follow the gateway or admin console instructions to add a new sensor, confirm the device’s unique ID, and verify successful communication. The pairing process is designed to be straightforward and quick, enabling rapid deployment across multiple sensors.
• Step 5: Configure alert preferences within the Monnit platform. Set up SMS and/or email notifications for contact closure events, test the alert to ensure delivery, and define escalation rules if needed. You can tailor the alert recipients, message content, and timing to fit your operational workflows.

Frequently asked questions

• What does the Monnit ALTA Wireless Dry Contact Sensor monitor? It monitors the closure (or opening) of an external dry contact circuit. This is ideal for detecting when two points come into contact, when a switch is activated, or when a contact plate is triggered.
• What alerts are supported? Alerts are delivered via SMS text messages and email through Monnit’s cloud platform. You can configure who receives alerts and how they are delivered to fit your team’s workflow.
• How is power managed in this device? The sensor runs on a standard AA battery, designed for long life and easy replacement. Battery life varies with usage, transmission frequency, and environmental conditions, but the design prioritizes low power consumption to reduce maintenance.
• Can I use this sensor with a variety of external switches? Yes. The dry contact input supports connections to external mechanical switches or contact plates, making it adaptable to many installation scenarios, including doors, valves, safety interlocks, and asset monitoring points.
• How do I install and maintain the sensor? Install by placing the sensor near the monitored contact points, connect the external switch or plate, insert a fresh AA battery, pair with your Monnit gateway, and configure alerts in the Monnit platform. Regular maintenance includes battery replacement when the LED indicator indicates low power and periodic testing of alerts to ensure reliability.