Wireless 0-5 VDC Voltage Meters
General Description
The ALTA Wireless Voltage Meter measures the voltage
between two electrical points. It can be connected
to the power and ground of any voltage source and
measure within stated accuracy up to 5 VDC. It can be
connected to any kind of variable voltage device, such
as a transducer or sensor that outputs voltage. If the
device to be measured is passive, the user must supply
their own excitation voltage to the device.
• Accurate to ± 3.0% full scale (FS) of
voltage range
• Accurate to ± 0.5% FS with user calibration
• Interfaces with any variable-voltage device
• 3 mV resolution
Principle of Operation
ALTA Wireless Voltage Meters read the voltage
difference between two electrical points and reports
back the measured voltage. It is programmed to sleep
for a user-given time interval (heartbeat) and then wake
up, convert the analog data, mathematically compute
the voltage, and transmit the data to the gateway, where
it is then logged into a cloud service. The user can
congure dened thresholds and have the system alert
on threshold breaches.
Example Applications
• Battery health
• Voltage measurement
• Transducer measurement
• Machinery
• Electrical motors
• Many additional applications
The Leading Enterprise Internet of Things Solution
PAGE 1
by
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 (Dife-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 notication system to congure sensors, view
data and set alerts via SMS text and email
Wireless Range Comparison
Monnit ALTA
Monnit
Other Wireless Platforms
Wifi
Bluetooth
Wireless Range Comparison
*Actual range may vary depending on environment.
** Battery life is determined by sensor reporting
frequency and other variables. Other power options
are also available.
1.125 in
(28.575 mm)
2.0 in
(50.8 mm)
0.875 in
(22.225 mm)
Pinch and Pull
To Change Battery
CR2032 BATTERY
ALTA Commercial Coin Cell Wireless 0-5 VDC Voltage Meter | Technical Specications
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)
Voltage range 0–5 volts DC**
Resolution ~3 mV
Accuracy +/- 3.0% FS
User-calibrated accuracy +/- 0.5% FS ***
Open circuit voltage ~0.00 volts
Max rated input 10 volts
Lead wire length 2 Wires, 1 ft (12 in), Red (+), Black (-), 18 AWG
(Custom lengths available upon request)
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
Certications 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
PinchPower™ Enclosures
Pull
(sensor away from base)
Pinch
(press in on the sides)
Press
(sensor back into base)
CR2032 BATTERY
+
_
CR2032 BATTERY
PAGE 2
*Hardware cannot withstand negative voltage. Please take care when connecting a power device.
** The sensor is capable of measuring above 5 volts but may not meet the specied accuracy above this value.
*** For best results calibrate at a voltage between 50% and 90% of the voltage range.
Industry
Canada
ALTA Commercial AA Wireless 0-5 VDC Voltage Meter | Technical Specications
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)
Voltage range 0–5 Volts DC**
Resolution ~3 mV
Accuracy +/- 3.0% FS
User-calibrated accuracy +/- 0.5% FS ***
Open-circuit voltage ~0.00 Volts
Max rated input 10 Volts
Lead wire length 2 Wires, 1 ft (12 in), Red (+), Black (-), 18 AWG
(Custom lengths available upon request)
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
Certications 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
1.111
2.470
2.470
1.111
4.375
3.295
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
*Hardware cannot withstand negative voltage. Please take care when connecting a power device.
** The sensor is capable of measuring above 5 volts but may not meet the specied accuracy above this value.
*** For best results calibrate at a voltage between 50% and 90% of the voltage range.
Industry
ALTA Industrial Wireless 0-5 VDC Voltage Meter | Technical Specications
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 efciency Optimized for high and low-light operation **
Charging efciency 40% *****
Luminous sustainability Minimum of 250 LUX *****
Voltage range 0–5 Volts DC***
Resolution ~3 mV
Accuracy +/- 3.0% FS
User-calibrated accuracy +/- 0.5% FS ****
Open circuit voltage ~0.00 Volts
Max rated input 10 Volts
Lead wire length 2 Wires, 1 ft (12 in), Red (+), Black (-), 18 AWG
(Custom lengths available upon request)
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
UL rating UL Listed to UL508-4x specications (File E194432)
Certications 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
3.701 in
(94.0 mm)
Height:
1.378 in
(35.0 mm)
2.316 in
(58.84 mm)
Industrial
Wireless
Sensor
PAGE 4
*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.
*** The sensor is capable of measuring above 5 volts but may not meet the specied accuracy above this value.
**** For best results calibrate at a voltage between 50% and 90% of the voltage range.
Industry
***** Solar feature’s energy harvesting circuitry works indoors with low light.
ADS-A042-1D (7/18)
Monnit, iMonnit, ALTA, PinchPower, Encrypt-RF and all other trademarks are property of Monnit, Corp.
© 2018 Monnit Corp. All Rights Reserved.
Monnit Corporation
3400 South West Temple
Salt Lake City, UT 84115
801-561-5555
www.monnit.com
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 sulde gas, ammonia gas, sulfuric acid gas, nitric oxides
gas, etc.
• Volatile or ammable gas
• Dusty conditions
• Low-pressure or high-pressure environments
• Wet or excessively humid locations
• Places with salt water, oils chemical liquids or organic solvents
• Where there are excessively strong vibrations
• Other places where similar hazardous conditions exist
Use these products within the specied 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).
• 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.
Proper Installation
If the sensor is not connected to the power source properly, it
will appear that the sensor is broken. Please follow this wiring
diagram to ensure proper performance and detection. LOAD
0 - 5
VDC
Wireless Sensor
0-5
VDC
VOLTAGE
METER