AVW206

900 MHz Wireless 2-Channel Vibrating Wire Analyzer Module

AVW206

Limited availability

900 MHz Wireless 2-Channel Vibrating Wire Analyzer Module

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Model:: AVW206
Item Number:: 42057
Warranty:: 1 year
Lead time:: 14 days

Overview

AVW206 900MHz Wireless 2-Channel Vibrating Wire Interface (Ships as 19247, 10873, & 19246)

The AVW206 is a vibrating wire analyzer module that includes an internal 910 to 918 MHz spread-spectrum radio for wireless communication, typically used in the U.S. and Canada. With this vibrating wire analyzer module, your data logger can measure vibrating wire strain gages, pressure transducers, piezometers, tiltmeters, crackmeters, and load cells. These sensors are used in a wide variety of structural, hydrological, and geotechnical applications because of their stability, accuracy, and durability.

Key Advantages

Greatly Reduces
Signal Noise
Includes built-in radio

Technical Description

The AVW206 uses vibrating wire spectral-analysis technology (VSPECT™). VSPECT observes the incoming sensor signal, performs a Fourier transform and a spectral analysis (transforming the time series into individual sinusoidal components in the frequency spectrum), and determines the sensor frequency by identifying the largest signal in the acceptable range while filtering out environmental and electrical noise.

The AVW206 analyzer module also provides many self-checking diagnostics such as vibrating element signal strength, signal-to-noise ratio, vibrating element signal decay ratio, and incorrect signal response. These diagnostics can be running in the background to give continual feedback of the condition for each sensor.

The AVW206 typically transmits its data to an RF401(A) spread-spectrum radio that is connected to the data logger. The AVW206 can also be connected directly to the data logger.

Benefits

Provides better measurements by significantly reducing incorrect readings caused by noise sources
Interfaces two vibrating wire sensors; more sensors may be connected if an AM16/32B multiplexer is used
Self-checking diagnostics give continual feedback on sensor condition
High resolution—less than 0.001 Hz (industry standard is 0.1 Hz)
Low current drain
Remote, wireless operation with on-board radio
Interfaces both temperature and frequency measurements from vibrating wire sensors

Specifications

-NOTE-: Electrical specifications are valid over a -25° to +50°C range unless otherwise specified. Non-condensing environment required.
Internal Radio Frequency Range: 910 to 918 MHz
Radio Power: 250 mW

Older AVW206 modules (serial # < 11224) have 100 mW radios.
Number of Vibrating Wire Sensors Measured: Up to 2 vibrating wire sensors can be connected to the analyzer module.
Additional sensors can be measured by using an AM16/32-series multiplexer.
Power Requirements: 9.6 to 16 Vdc
Analog Input/Outputs: 2 differential (DF) vibrating wire measurements (V+ and V-) and 2 single-ended (SE) ratiometric resistive half-bridge measurements (T+ and T-) for vibrating wire sensor's onboard temperature sensor.
Digital Control Ports: 3 digital control ports (C1 – C3)
C1 functions as an SDI-12 I/O communication port.C2 functions as a Clk output for multiplexer control.C3 functions as a Reset output for multiplexer control.
RS-232 Port: 1 9-pin RS-232 port
(for connecting to a data logger COM port)
Measurement Resolution: 0.001 Hz RMS
(±250 mV differential input range; -55° to +85°C)
Measurement Accuracy: ±0.013% of reading
(±250 mV differential input range; -55° to +85°C)
Input Voltage Range: ±250 mV
(differential) for vibrating wire inputs
Common Mode Range: ±25 V
Baud Rates: Selectable from 1200 to 38.4 kbps
(ASCII protocol is one start bit, one stop bit, eight data bits, and no parity.)
Memory: Either 128 or 512 kB of SRAM
Memory: 2 MB of OS Flash
CE Compliance Standards to which Conformity Is Declared: IEC61326:2002
Dimensions: 21.6 x 11.18 x 3.18 cm
(8.5 x 4.5 x 1.2 in.)
Weight: 0.43 kg
(0.95 lb)

Typical Current Drain @ 12 Vdc

Quiescent, Radio Off: ~0.3 mA
Radio Duty Cycling 1 s: ~3 mA
(includes quiescent current)
Radio Always On: ~26 mA
(radio transmit current 100 mA)
Active RS-232 Communication: ~6 mA
(3 s after communication stops, the current will drop to the quiescent current.)
Measurement: ~25 mA
(averaged over the 2 s)

Accessories

(9)

Related Resources

Case Studies

Documents

Videos and Tutorials

VSPECT™ vs. Noisy Data
July 23, 2025 (3:20)
Using VSPECT technology to filter electrical noise interference.
Watch