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RSTAR Affinity Vibrating Wire Data Logger

The RSTAR Affinity Single Channel Vibrating Wire Data Logger is a cost-effective, battery-powered data logger, designed for reliable, unattended monitoring of a single Vibrating Wire sensor (such as a Piezometer, Strain Gauge, or Crackmeter) and its Thermistor.

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Overview

The RSTAR Affinity Single Channel Vibrating Wire Data Logger offers a streamlined, cost-effective solution for singular, remote geotechnical and structural monitoring. Designed to connect a single Vibrating Wire sensor (such as a Piezometer, Strain Gauge, or Crack Meter), this compact logger wirelessly transmits data to the RSTAR Affinity Gateway for seamless integration with the RSTAR Affinity software platform.

Engineered for flexibility and long-range performance, the logger supports LoRaWAN communication over distances up to 15 km, depending on environmental conditions. Configuration is securely managed via Bluetooth Low Energy (BLE) using the RSTAR Affinity Field app, ensuring authenticated setup and data integrity. Whether deployed in standalone mode or as part of a larger LPWAN network, this logger delivers reliable, low-power data acquisition for critical monitoring applications.

Benefits

Data insights

Data insights

Ease of use

Ease of use

Improve safety

Improve safety

Features and benefits

RSTAR Affinity Vibrating Wire Data Logger Physical Specifications

DimensionsVersion 1 (Radio Antenna): 422 mm x 75 mm x 56 mm (16.61” x 2.95” x 2.20”)
Version 2 (No Radio Antenna): 228 mm x 75 mm x 56 mm (8.96” x 2.96” x 2.20”)
Total Mass754g
Housing MaterialGRP (Glass Reinforced Polyester)
Ingress Protection MarkingIP66 rated
Mounting Options*

Wall, Pole and Secondary Enclosure Mounting

*Wall mounting screws not provided

AntennaExternal: +2 dBi (RPSMA-Male connector)

General Specifications

Temperature Operating RangeFrom -40°C to 60°C

Power Specifications

Battery Voltage3.6V
Number of Cells1 primary battery cell
Battery Cell SizeD
Recommended Battery CellSaft LSH20
Battery Nominal Capacity13.0 Ah @ 20°C per cell
Battery Life Expectancy (hourly readings)*

1 x Vibrating Wire Sensor @ 20°C = ~5 yrs

*Battery lifespan is relative to environmental conditions and sample interval rate

Vibrating Wire Specifications

Excitation Voltage5V
Resonant Frequency Measurement Range200 Hz to 6000 Hz
Resonant Frequency Resolution<0.02 Hz
Resonant Frequency Accuracy±0.025 Hz (0.01% FS)
ProtectionInputs are designed to IEC-61000-42 ESD 30 kV (Air), 30 kV (Contact)

Thermistor Specifications

Measurement Range0 Ω to 164 MΩ
Measurement Resolution0.003 °C at 25 °C or 0.391 Ω at 3 kΩ
Accuracy± 0.1°C
ProtectionInputs are designed to IEC-61000-42 ESD 30 kV (Air), 30 kV (Contact)

BLE (Bluetooth Low Energy) Radio Specifications

BluetoothBT 5.0 single mode
Frequency2.402 - 2.480 GHz
Raw Data Rates125 kbps, 500 kbps, 1 Mbps, 2 Mbps
Maximum Transmit Power+8 dBm
Low Power Listen ModeContinuous

LoRA (Long-Range) Specifications

Operating Regions

LoRaWAN US915

LoRaWAN EU868

LoRaWAN AS923-1/2/3/4

LoRaWAN AU915

Commonly used frequency plans by country

Please contact RST Instruments to confirm the best frequency for your region.

ProtocolsLoRaWAN 1.03
RangeUp to 15 km (at 900 MHz) in open country, depending on frequency, antenna, and line of sight

Industries

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Civil infrastructure

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Energy

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Surface metal

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Underground mining

Contact an expert

Whether you need support, want to request a quote or simply want to learn more, reach out to our Geosolutions team. We’re here to help.