Data Acquisition & Logging

Wireless Accelerometer -Vibration Meters

ALTA Wireless Vibration Meter Sensor uses an accelerometer to measure vibration speed and frequency and report on 3 axes.

Description Features Configuration Application

The ALTA Wireless Vibration Meter Sensor uses an accelerometer to measure vibration speed and frequency and report on 3 axes. The sensor reports speed (mm/s) and frequency (Hz) on all three axes, and duty cycle (how much of the report interval vibration was present).

Principle of Operation

The ALTA Vibration Meter measures the vibration intensity of the system to which it is attached. The sensor uses an accelerometer to capture g-force on all axes and then calculates speed and frequency from that acceleration data. The Vibration Meter reports the duty cycle, or how long the sensor was measuring vibrations throughout the heartbeat.

• Three axis measurement

• Reports critical vibration and frequency data

• Runtime indication via duty cycle

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 AA Wireless Accelerometer - Vibration 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					-18°C to 55°C (0°F to 130°F) using alkaline
(board circuitry and batteries)					-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)
Speed measurement range					0 to 25.5 mm/s
Speed measurement resolution					0.1 mm/s
Frequency measurement range					10 to 200 Hz

Frequency measurement resolution					1 Hz
Vibration intensity threshold range					0 to 1.701 g
Vibration intensity threshold resolution					0.063 g
Accelerometer g-Force Range					+/- 2 g
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 Accelerometer - Vibration 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 ***
Speed measurement range		0 to 25.5 mm/s
Speed measurement resolution		0.1 mm/s
Frequency measurement range		10 to 200 Hz
Frequency measurement resolution		1 Hz
Vibration intensity threshold range		0 to 1.701 g
Vibration intensity threshold resolution		0.063 g
Accelerometer g-Force Range		+/- 2 g
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)

• Vibration monitoring

• Smart machines, smart structures & smart materials

• Bridge and building seismic activity monitoring

• Assembly line monitoring

• Many additional applications

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