

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.
Overview
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.
Features and benefits
Features and benefits
RSTAR Affinity Vibrating Wire Data Logger Physical Specifications
| Dimensions | Version 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 Mass | 754g |
| Housing Material | GRP (Glass Reinforced Polyester) |
| Ingress Protection Marking | IP66 rated |
| Mounting Options* | Wall, Pole and Secondary Enclosure Mounting *Wall mounting screws not provided |
| Antenna | External: +2 dBi (RPSMA-Male connector) |
General Specifications
| Temperature Operating Range | From -40°C to 60°C |
Power Specifications
| Battery Voltage | 3.6V |
| Number of Cells | 1 primary battery cell |
| Battery Cell Size | D |
| Recommended Battery Cell | Saft LSH20 |
| Battery Nominal Capacity | 13.0 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 Voltage | 5V |
| Resonant Frequency Measurement Range | 200 Hz to 6000 Hz |
| Resonant Frequency Resolution | <0.02 Hz |
| Resonant Frequency Accuracy | ±0.025 Hz (0.01% FS) |
| Protection | Inputs are designed to IEC-61000-42 ESD 30 kV (Air), 30 kV (Contact) |
Thermistor Specifications
| Measurement Range | 0 Ω to 164 MΩ |
| Measurement Resolution | 0.003 °C at 25 °C or 0.391 Ω at 3 kΩ |
| Accuracy | ± 0.1°C |
| Protection | Inputs are designed to IEC-61000-42 ESD 30 kV (Air), 30 kV (Contact) |
BLE (Bluetooth Low Energy) Radio Specifications
| Bluetooth | BT 5.0 single mode |
| Frequency | 2.402 - 2.480 GHz |
| Raw Data Rates | 125 kbps, 500 kbps, 1 Mbps, 2 Mbps |
| Maximum Transmit Power | +8 dBm |
| Low Power Listen Mode | Continuous |
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. |
| Protocols | LoRaWAN 1.03 |
| Range | Up to 15 km (at 900 MHz) in open country, depending on frequency, antenna, and line of sight |
Resources
Resources
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Contact an expert
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.
