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Discontinued Products
Wireless Temperature Sensors
The ALTA Wireless Temperature Sensor measures the ambient thermal conditions of your environment. These sensors accurately monitor temperature changes in your physical location. Settings including notifications, alerts, reports, and maps are customizable in the online interface of iMonnit.
The temperature sensor is built to be out of the box and running in minutes. Industry leading 25 month NIST certified product included on leaded temperature sensors.
• Accurate to ± 1° C (± 1.8° F) • Increased accuracy by user calibration to ± 0.25° C (± 0.45° F)
Features of Monnit ALTA Sensors
- Wireless range of 1,200+ feet through 12+ walls *
- Frequency-Hopping Spread Spectrum (FHSS)
- Improved interference immunity
- Improved power management for longer battery life ** (12+ years on AA batteries)
- Encrypt-RF® Security (Diffie-Hellman Key Exchange
- AES-128 CBC for sensor data messages)
- Onboard data memory stores up to 512 readings per sensor:
- 10-minute heartbeats = 3.5 days
- 2-hour heartbeats = 42 days
- Over-the-air updates (future proof)
- Free iMonnit basic online wireless sensor monitoring and notification system to configure sensors, view data and set alerts via SMS text and email
* Actual range may vary depending on environment.
**Battery life is determined by sensor reporting frequency and other variables. Other power options are also available.
ALTA Commercial Coin Cell Wireless Temperature Sensor | Technical Specifications
| Supply voltage | 2.0–3.8 VDC * | ||||
| Current consumption | 0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), | ||||
| 2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA | |||||
| (radio TX mode) | |||||
| Operating temperature range (board circuitry and coin cell) | -7°C to +60°C (20°F to +140°F) ** | ||||
| Optimal battery temperature range (coin cell) | +10°C to +50°C (+50°F to +122°F) | ||||
| External Probe and Lead Operating Range | -40°C to +125°C ( -40°F to +257°F ) | ||||
| Accuracy @ 25°C | +/- 1% (1° C or 1.8° F) | ||||
| User-calibrated accuracy | +/- 0.25° C (± 0.45° F) | ||||
| Time constant @ 25°C | 30 sec | ||||
| Integrated memory | Up to 512 sensor messages | ||||
| Wireless range | 1,200+ ft non-line-of-sight | ||||
| Security | Encrypt-RF® (256-bit key exchange and AES-128 CTR) | ||||
| Weight | 0.7 ounces | ||||
ALTA Commercial AA Wireless Temperature Sensor | Technical Specifications
| Supply voltage | 2.0–3.8 VDC (3.0–3.8 VDC using power supply) * | ||||
| Current consumption | 0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), | ||||
| 2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA | |||||
| (radio TX mode) | |||||
| Operating temperature range (board circuitry and batteries) | -18°C to 55°C (0°F to 130°F) using alkaline | ||||
| -40°C to 85°C (-40°F to 185°F) using lithium ** | |||||
| Optimal battery temperature range (AA) | +10°C to +50°C (+50°F to +122°F) | ||||
| External Probe and Lead Operating Range | --40°C to +125°C ( -40°F to +257°F ) | ||||
| Accuracy @ 25°C | +/- 1% (1° C or 1.8° F) | ||||
| User-calibrated accuracy | +/- 0.25° C (± 0.45° F) | ||||
| Time constant @ 25°C | 15 sec max | ||||
| Integrated memory | Up to 512 sensor messages | ||||
| Wireless range | 1,200+ ft non-line-of-sight | ||||
| Security | Encrypt-RF® (256-bit key exchange and AES-128 CTR) | ||||
| Weight | 3.7 ounces | ||||
ALTA Industrial Wireless Temperature Sensor | Technical Specifications
| Supply voltage | 2.0–3.8 VDC (3.0–3.8 VDC using power supply) * | |||||
| Current consumption | 0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle), | |||||
| 2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio | ||||||
| TX mode) | ||||||
| Operating temperature range (board circuitry and battery) | -40°C to +85°C (-40°F to +185°F) | |||||
| Included battery | Max temperature range | -40° to +85°C (-40° to +185°F) | ||||
| Capacity | 1500 mAh | |||||
| Optional solar feature | Solar panel | 5VDC/30mA (53mm x 30mm) | ||||
| Charging temperature range | 0° to 45°C (32° to 113°F) | |||||
| Max temperature range | -20° to 60°C (-4° to 140°F) | |||||
| Included rechargeable battery | 600 mAh/>2000 charge cycles (80% of initial capacity) | |||||
| Solar efficiency | Optimized for high and low-light operation ** | |||||
| Charging efficiency | 40% *** | |||||
| Luminous sustainability | Minimum of 250 LUX *** | |||||
| External Probe and Lead Operating Range | -40°C to +125°C (-40°F to +257°F) | |||||
| (Limited to main-unit circuitry, -40°C to +85°C) | ||||||
| Accuracy @ 25°C | +/- 1% (1° C or 1.8° F) | |||||
| User-calibrated accuracy | +/- 0.25° C (± 0.45° F) | |||||
| Time constant @ 25°C | 30 sec | |||||
| Integrated memory | Up to 512 sensor messages | |||||
| Wireless range | 1,200+ ft non-line-of-sight | |||||
| Security | Encrypt-RF® (256-bit key exchange and AES-128 CTR) | |||||
| Weight | 4.7 ounces | |||||
| Enclosure rating | NEMA 1, 2, 4, 4x, 12 and 13 rated, sealed and weather proof | |||||
Example Applications
- Ambient temperature monitoring
- Environmental monitoring
- Smart machines & smart structures
- HVAC operation & testing
- Data center monitoring
- Many additional applications
