by
The Leading Enterprise Internet of Things Solution
Wireless Temperature Sensors
General Description
The ALTA Wireless Temperature Sensor uses a type
NTC thermistor to measure temperature.
• Accurate to ± 1° C (± 1.8° F)
• Increased accuracy by user calibration
to ± 0.25° C (± 0.45° F)
Features of Monnit ALTA Sensors
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•
•
•
•
•
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
Principle of Operation
The ALTA Wireless Temperature Sensor outputs the
ambient temperature in degrees Fahrenheit. It is
programmed to sleep for a user-given time interval
(heartbeat) and then wakeup, send power to the NTC
Thermistor and wait for it to stabilize, and convert the
analog data, mathematically compute the temperature
and transmit the data to the gateway. To stay within the
abilities of the processor, the temperature is computed
off a data table provided by the manufacturer. To reduce
error, a variable resistor configuration is implemented
over specified temperature ranges.
•
•
*
Actual range may vary depending on environment.
**
Battery life is determined by sensor reporting
frequency and other variables. Other power options
are also available.
Example Applications
•
•
•
•
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Ambient temperature monitoring
Environmental monitoring
Smart machines & smart structures
HVAC operation & testing
Data center monitoring
Many additional applications
Wireless Range Comparison
Wireless Range Comparison
Monnit ALTA
Monnit
Other Wireless Platforms
Wifi
Bluetooth
PAGE 1
1.125 in
(28.575 mm)
Pinch
To Chan
2.0 in
(50.8 mm)
CR2
0.875 in
(22.225 mm)
ALTA Commercial Coin Cell Wireless Temperature Sensor | Technical Specifications
Supply voltage
Current consumption
2.0–3.8 VDC *
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)
-7°C to +60°C (20°F to +140°F) **
+10°C to +50°C (+50°F to +122°F)
-40°C to +125°C (-40°F to +257°F)
(Limited to main-unit circuitry, -7°C to +60°C unless wire leads
are being used.)
+/- 1% (1° C or 1.8° F)
+/- 0.25° C (± 0.45° F)
30 sec
Up to 512 sensor messages
1,200+ ft non-line-of-sight
Encrypt-RF® (256-bit key exchange and AES-128 CTR)
0.7 ounces
Operating temperature range (board circuitry and coin cell)
Optimal battery temperature range (coin cell)
Thermistor temperature range (thermistor only)
Accuracy @ 25°C
User-calibrated accuracy
Time constant @ 25°C
Integrated memory
Wireless range
Security
Weight
Certifications
Industry
Canada
900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-
G2SC1. 868 and 433 MHz product tested and found to
comply with: EN 300 220-2 V3.1.1 (2017-02), EN 300 220-2
V3.1.1 (2017-02) and EN 60950
*
Hardware cannot withstand negative voltage. Please take care when connecting a power device.
PinchPower™ Enclosures
_
CR2032 BATTERY
CR2032 BATTERY
+
(press in on the sides)
Pinch
(sensor away from base)
Pull
(sensor back into base)
Press
PAGE 2
2.470
2.470
4.375
3.295
1.111
1.111
ALTA Commercial AA Wireless Temperature Sensor | Technical Specifications
Supply voltage
Current consumption
2.0–3.8 VDC (3.0–3.8 VDC using power supply) *
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)
-18°C to 55°C (0°F to 130°F) using alkaline
-40°C to 85°C (-40°F to 185°F) using lithium **
+10°C to +50°C (+50°F to +122°F)
-40°C to +125°C (-40°F to +257°F)
(Limited to main-unit circuitry, -7°C to +60°C unless thermistor
leads are being used.)
+/- 1% (1° C or 1.8° F)
+/- 0.25° C (± 0.45° F)
15 sec max
Up to 512 sensor messages
1,200+ ft non-line-of-sight
Encrypt-RF® (256-bit key exchange and AES-128 CTR)
3.7 ounces
Operating temperature range (board circuitry and batteries)
Optimal battery temperature range (AA)
Thermistor temperature range (thermistor only)
Accuracy @ 25°C
User-calibrated accuracy
Time constant @ 25°C
Integrated memory
Wireless range
Security
Weight
Certifications
Industry
Canada
900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-
G2SC1. 868 and 433 MHz product tested and found to
comply with: EN 300 220-2 V3.1.1 (2017-02), EN 300 220-2
V3.1.1 (2017-02) and EN 60950
*
Hardware cannot withstand negative voltage. Please take care when connecting a power device.
Power Options
The standard version of this sensor is powered by two replaceable 1.5 V AA sized batteries (included with purchase).
This sensor is also available with a line power option. The line powered version of this sensor has a barrel power
connector allowing it to be powered by a standard 3.0–3.6 V power supply. The line powered version also uses two
standard 1.5 V AA batteries as backup for uninterrupted operation in the event of line power outage.
Power options must be selected at time of purchase, as the internal hardware of the sensor must be changed to support
the selected power requirements.
PAGE 3
Industrial
Wireless
Sensor
2.316 in
(58.84 mm)
3.701 in
(94.0 mm)
Height:
1.378 in
(35.0 mm)
ALTA Industrial Wireless Temperature Sensor | Technical Specifications
Supply voltage
Current consumption
2.0–3.8 VDC (3.0–3.8 VDC using power supply) *
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)
-40°C to +85°C (-40°F to +185°F)
-40° to +85°C (-40° to +185°F)
1500 mAh
5VDC/30mA (53mm x 30mm)
0° to 45°C (32° to 113°F)
-20° to 60°C (-4° to 140°F)
600 mAh/>2000 charge cycles (80% of initial capacity)
Optimized for high and low-light operation **
40% ***
Minimum of 250 LUX ***
-40°C to +125°C (-40°F to +257°F)
(Limited to main-unit circuitry, -40°C to +85°C)
+/- 1% (1° C or 1.8° F)
+/- 0.25° C (± 0.45° F)
30 sec
Up to 512 sensor messages
1,200+ ft non-line-of-sight
Encrypt-RF® (256-bit key exchange and AES-128 CTR)
4.7 ounces
NEMA 1, 2, 4, 4x, 12 and 13 rated, sealed and weather proof
UL Listed to UL508-4x specifications (File E194432)
900 MHz product; FCC ID: ZTL-G2SC1 and IC: 9794A-G2SC1.
868 and 433 MHz product tested and found to comply with: EN
300 220-2 V3.1.1 (2017-02), EN 300 220-2 V3.1.1 (2017-02)
and EN 60950
Max temperature range
Capacity
Optional solar feature
Solar panel
Charging temperature range
Max temperature range
Included rechargeable battery
Solar efficiency
Charging efficiency
Luminous sustainability
Thermistor temperature range (thermistor only)
Accuracy @ 25°C
User-calibrated accuracy
Time constant @ 25°C
Integrated memory
Wireless range
Security
Weight
Enclosure rating
UL rating
Certifications
Operating temperature range (board circuitry and battery)
Included battery
Industry
Canada
*
Hardware cannot withstand negative voltage. Please take care when connecting a power device.
**
Light present 25% of day yields 125% of operating power to support 10-minute heartbeats.
***
Solar feature’s energy harvesting circuitry works indoors with low light.
PAGE 4
Commercial Grade Sensors
Monnit commercial grade sensors are designed for applications in ordinary environments (normal room temperature,
humidity and atmospheric pressure). Do not use these sensors under the following conditions as these factors can
deteriorate the product characteristics and cause failures and burnout.
•
Corrosive gas or deoxidizing gas: chlorine gas, hydrogen sulfide gas, ammonia gas, sulfuric acid gas, nitric oxides
gas, etc.
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Volatile or flammable gas
• Dusty conditions
• Low-pressure or high-pressure environments
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Wet or excessively humid locations
• Places with salt water, oils chemical liquids or organic solvents
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Where there are excessively strong vibrations
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Other places where similar hazardous conditions exist
Use these products within the specified temperature range. Higher temperature may cause deterioration of the
characteristics or the material quality.
Industrial Grade Sensors | Type 1, 2, 4, 4X, 12 and 13 NEMA Rated Enclosure
Monnit’s Industrial sensors are enclosed in reliable, weatherproof NEMA-rated enclosures. Our NEMA-rated enclosures
are constructed for both indoor or outdoor use and protect the sensor circuitry against the ingress of solid foreign objects
like dust as well as the damaging effects of water (rain, sleet, snow, splashing water, and hose-directed water).
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Safe from falling dirt
Protects against wind-blown dust
Protects against rain, sleet, snow, splashing water, and hose-directed water
Increased level of corrosion resistance
Will remain undamaged by ice formation on the enclosure
For more information about our products or to place an order, please contact
our sales department at 801-561-5555.
Visit us on the web at
www.monnit.com.
Monnit Corporation
3400 South West Temple
Salt Lake City, UT 84115
801-561-5555
www.monnit.com
Monnit, iMonnit, ALTA, PinchPower, Encrypt-RF and all other trademarks are property of Monnit, Corp.
© 2018 Monnit Corp. All Rights Reserved.
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