Data Acquisition & Logging

Wireless AC Voltage Detection Sensors (4-500 VAC)

Description Features Configuration Application

The ALTA wireless AC voltage detection sensor can interface with other devices to detect voltage from 4 VAC to 500 VAC. The sensor reports presence or absence of voltage when the 4 volt threshold is breached. It is intended for use on power sources or power supplies up to 500 VAC.

Not intended for voltages higher than 600 VAC. Perfect for monitoring electrical appliances.

• Wireless interface for detecting voltage

• Detects voltage from 4 to 500 VAC.

Principle of Operation

The ALTA wireless AC voltage detection sensor can be connected to the hot(black) and neutral(white) terminals of an electrical device or power supply line, triggering on the state change from voltage presence to absence and vice versa. The information is sent to the iMonnit Online Sensor Monitoring and Notification System where the data is displayed as either “No Voltage” or “Voltage Detected”. The data is stored in the online system and can be reviewed and exported as a spread sheet or graph. Notifications can also be set up through the online system to alert the user when certain criteria have been met.

• 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 AC Voltage Detection 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)
Absolute Maximum Input Voltage					600 VAC rms **
Response Time					~1 Second
Minimum Detection Voltage					4 VAC rms
Indeterminant Detection Region					3 - 4 VAC rms ***
Input Impedance					2 MOhm
Leaded Wire Specification					2 Wires, 1 ft (12 in), Black (Line), White (Common), 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

ALTA Commercial Coin Cell Wireless AC Voltage Detection 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 coin cell)					-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)
Absolute Maximum Input Voltage					600 VAC rms **
Response Time					~1 Second
Minimum Detection Voltage					> 4 VACrms
Indeterminant Detection Region					3 - 4 VAC rms ***
Input Impedance					2 MOhm
Leaded Wire Specification					2 Wires, 1 ft (12 in), Black (Line), White (Common), 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

ALTA Industrial Wireless AC Voltage Detection 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 ****
Absolute Maximum Input Voltage		600 VAC rms **
Response Time		~1 Second
Minimum Detection Voltage		> 4 VAC rms
Indeterminate Detection Region		3 – 4 VAC rms
Input Impedance		2 MOhm
Leaded wire specification		2 Wires, 1 ft (12 in), Black (Line), White (Common), 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 specifications (File E194432)

Example Applications

• Sprinkler Systems

• HVAC Systems

• Appliances

• Electrical Sources

• Power Couplings

• Line Power

• Power Supplies

• Sump Pumps

• Many additional applications

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