Description
Mobeye Frost Alert System – Outdoor Temperature Monitoring

Accurate temperature monitoring devices and remote frost alarms are essential for effective frost protection. The Mobeye ThermoGuard outdoor version, also known as the Mobeye Frost Alert CM4200X, is designed to warn you promptly of weather conditions that can cause serious crop damage. As long as the temperature stays above the preset minimum, the system remains inactive and no response is required. The moment the temperature drops into the alarm range, the device immediately alerts you with both a phone call and a text message, delivering precise, local temperature data so you can take timely action.
The CM4200X serves as a frost and freeze alarm dialler designed for a variety of outdoor applications. It holds particular significance for farmers seeking to safeguard their plants and crops from frost-related damage. During spring, when night-time temperatures drop to around freezing and fruit trees are in bud, fruit growers and orchardists must shield their orchards and vineyards from potential frost damage and losses. They achieve this by activating irrigation systems and wind machines to create a protective ice layer for blossoms. The Mobeye Frost Alert ensures that frost warnings are promptly delivered when temperatures drop too low.
Orchard Frost Alarm
The Mobeye detector wakes the fruit grower up via phone once the predetermined temperature is attained. Subsequently, the grower can assess whether protective measures, such as sprinkling or other interventions, are necessary for safeguarding the blossoms.
The Mobeye ThermoGuard CM4200X offers continuous temperature monitoring and alerts farmers and fruit growers when temperatures become critically low. This battery-powered alarm system can call and/or send texts to pre-defined telephone numbers when the temperature falls below the critical threshold. Its IP66 rated waterproof enclosure makes it suitable for outdoor use.
Frost Warning for Frost Workers and Road Gritters
This versatile solution benefits not only fruit growers and farmers but also workers in various fields during frost, including those in construction, highway maintenance, salt truck operation, and road gritters.
ThermoGuard for Wet Situations
Other situations in which the CM4200X is appropriate include cooling cells with elevated humidity levels or environments where the ThermoGuard may be exposed to moisture. Its IP66-rated outdoor enclosure makes the CM4200X suitable for use in wet or damp conditions.
Frost Alert Extended Version CML4275
The Mobeye CM4200X is a battery-operated temperature alarm with an integrated communication module and an outdoor IP66-rated enclosure. For those who require temperature trend analysis in addition to alarms, the extended version, Mobeye CML4275, is available.
The CML4275 offers multiple features that are valuable year-round. In addition to setting a lower limit for night frost detection, an upper temperature limit can be defined. If this limit is exceeded, the grower receives a notification, helping them decide when to adjust foil coverings or initiate cooling measures.
Mobeye night frost detectors continuously monitor local outdoor temperatures and trigger alarms when the preset limit is reached. While the Mobeye CM4200X provides alarms, possibly with repeats, the CML4275 goes a step further by displaying temperature trends through an online application once in alarm mode, with the graph updating regularly. Both detectors have long-lasting battery life, and their temperature sensors come factory calibrated.
It is essential to note that the CM4200X functions primarily as a freeze alarm dialler without protocol or recording capabilities. It alerts you only when temperature values deviate from the preset parameters or if connected sensors detect issues. The device allows connection of a single temperature sensor, and the open collector output is not available. Otherwise, its behaviour is identical to that of the CML4275.
How does the Frost Alert CM4200X Works
- Choose the Mobeye SIM card in combination with the Mobeye Internet Portal (management tool) or purchase a local 2G SIM card (normal size).
- Insert the SIM card and batteries.
- The battery life exceeds the yearly frost period, even at low temperatures.
- You’ll receive a notification when it’s time to replace the batteries.
- Set the lower temperature limit.
- Add at least one telephone number as an alarm receiving number.
- In the event of an alarm situation, you will receive a phone call and SMS text messages (with current temperature).
Mobeye Internet Portal
You can use your Mobeye Frost Alarm either as a standalone solution or in conjunction with the Mobeye Internet Portal and App for enhanced functionality and user-friendliness. With the Internet Portal, large companies can remotely monitor temperatures across multiple orchards. Access to the Internet Portal is exclusive to Mobeye devices using Mobeye SIM cards.
Typical Applications for the Mobeye Frost Monitoring System
The Mobeye Frost Monitoring System is a dependable and precise frost alarm and temperature alert solution designed to prevent frost damage in sensitive environments. It continuously tracks temperature changes and sends timely notifications when levels drop to critical points. By providing early frost warnings, it helps protect crops, plants, and equipment, ensuring productivity and safety across agricultural and industrial operations.
The Mobeye frost monitoring system is widely used by:
- Farmers protecting fields and crops from frost damage
- Fruit growers and orchardists monitoring temperature-sensitive blossoms
- Winegrowers and vineyard managers maintaining ideal conditions for vines
- Gardeners and tree cultivators ensuring plant health during cold periods
- Garden enthusiasts preventing frost damage to ornamental plants
- Salt and grit workers preparing for freezing road conditions
- Cooling cell operators maintaining stable conditions in damp or refrigerated environments
For an indoor freeze alarm dialler, we recommend the Mobeye ThermoGuard CM4200.













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