wireless humidity sensor in greenhouse application example

Wireless Humidity and Temperature Sensors

It’s not the heat, it’s the humidity.

Whether it’s artifacts or data, you know that maintaining a relative humidity (RH) between 40–60% percent can be the difference between proper preservation and irreversible loss.

Monnit ALTA® Humidity Sensors remotely monitor RH with a +/- 3% accuracy (between 10–90% RH), temperature, and dew point in facilities or enclosures. If the humidity exceeds your specified limits, these scientific-grade sensors instantly alert you via text, email, or call for swift correction.

A Humidity Sensor for Every Business

As one of Monnit’s broadest (and most popular remote monitoring solutions), the ALTA® Humidity Sensors are available in wireless commercial, enterprise, and industrial models. A Power over Ethernet (PoE) humidity sensor is also available. Based on the model selected, you can further tailor the sensor with options including 3–25’ leads, 7-month NIST Certification, and solar power.

The depth and breadth of our Humidity Sensors make them favored by Ivy League museums, data centers, manufacturers, life sciences, food processors, agriculture, and art galleries. Select a sensor below to track conditions surrounding mission-critical systems, sensitive inventory, and invaluable assets.

Wireless Humidity Sensor - AA Battery Powered
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Enterprise Wireless

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Wireless Humidity Sensor - Coin Cell Powered
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Commercial Wireless

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Industrial Wireless Humidity Sensor
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Industrial Wireless

  • Industrial Battery Powered
  • Up to 7 Years Battery Life
  • Specifications

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PoE Sensors
PoE•X Humidity Sensor
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PoE•X - Power over Ethernet

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WiFi Sensors
Wi-Fi Humidity Sensor
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MoWi - Wi-Fi

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Which Sensor is Right For Me?

  • Enterprise AA-battery powered: Our most popular type is ideal for typical commercial & enterprise environments, such as server rooms. A 1,200+ ft. range readily covers most facilities.
  • CC-battery powered: Compact sensor is great for space-restricted areas such as control cabinets or cold storage.
  • Industrial: Sensor's weatherproof, NEMA-rated enclosure withstands demanding indoor/outdoor use, e.g., warehouses & production facilities.
  • PoE•X: Power over Ethernet sensors integrate with a building's PoE network; it can also be used with a standard Ethernet infrastructure & powered via an optional AC adapter.
  • MoWi: This discreet sensor uses your own Wi-Fi for networking and data transmission—popular for smaller businesses and facilities.
Still not sure which sensor type to choose? Visit our Sensor Comparison page.



2,000+ ft. Range through 18+ Walls
Up to 12 Years of Battery Life
Automated Data Logging


Unbeatable Range Eases Networking
Dependable, Worry-free Operation
Streamlined Compliance & Data Analysis

How Monnit Sensors Work

how Monnit remote monitoring works

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