Data Acquisition & Logging

Wireless 0-200 VDC Voltage Meters

The ALTA Wireless Voltage Meter measures the voltage between two electrical points.

Description Features Configuration Application

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 measured within stated accuracy up to 200 VDC. Perfect for measuring battery voltage at specified intervals where sensor data will be wirelessly sent to iMonnit, the online sensor monitoring system.

• Wireless interface for measuring voltage

• Available in multiple voltage ranges. Measures voltage up to 200 VDC

Principle of Operation

By connecting the leads on the ALTA Wireless Voltage Meter to the positive and ground terminals of a battery, users can measure battery voltage through the iMonnit Online Sensor Monitoring and Notification System.

Notifications can be set up through the online system to alert the user when battery levels reach a certain point. The data is also stored in the online system and can be reviewed and exported as a data sheet or graph.

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 0-200 VDC Voltage Meter | 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)
Full-scale voltage					0–200 VDC ***
Absolute maximum voltage					250 VDC ***
Sensor resolution					0.01 VDC
Minimum voltage detected					150mV
Accuracy					@1V or above: +/- 1% (0.5% typical)
					@500mV: +/- 2% typical
					@250mV: +/- 4% typical
					@150mV: +/- 7% typical
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 0-200 VDC Voltage Meter | 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)
Full-scale voltage					0–200 VDC ***
Absolute maximum voltage					250 VDC ***
Sensor resolution					0.01 VDC
Minimum voltage detected					150mV
Accuracy					@1V or above: +/- 1% (0.5% typical)
					@500mV: +/- 2% typical
					@250mV: +/- 4% typical
					@150mV: +/- 7% typical
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 0-200 VDC Voltage Meter | 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 ***
Full-scale voltage		0–200 VDC ***
Absolute maximum voltage		250 VDC ***
Sensor resolution		0.01 VDC
Minimum voltage detected		150mV
Accuracy		@1V or above: +/- 1% (0.5% typical)
		@500mV: +/- 2% typical
		@250mV: +/- 4% typical
		@150mV: +/- 7% typical
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 specifications (File E194432)

Example Applications

• Car battery monitoring

• Boat and marine battery monitoring

• RV battery monitoring

• ATV/motorcycle battery monitoring

• Lawn mower and utility vehicle battery monitoring

• Many additional applications

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