Solinst Biofoul Screen for Levelogger Probes
| Brand | Solinst |
|---|---|
| Origin | Canada |
| Model | Biofoul Screen |
| Application | Protective mesh guard for Solinst Levelogger Edge, Levelogger Junior Edge, and LTC Levelogger Junior series |
| Compatible Sensor Type | Submersible water level loggers with integrated conductivity and pressure sensing elements |
| Material | Corrosion-resistant stainless steel (316 SS) |
| Mesh Opening | 0.5 mm nominal aperture |
| Outer Diameter | 25.4 mm (1.0 in) |
| Length | 76 mm (3.0 in) |
| Weight | 42 g |
| Operating Temperature Range | –20 °C to +50 °C |
| IP Rating | IP68 (fully submersible to 100 m depth) |
Overview
The Solinst Biofoul Screen is an engineered passive fouling mitigation accessory designed specifically for deployment with Solinst’s family of submersible water level loggers—including the Levelogger Edge, Levelogger Junior Edge, and LTC Levelogger Junior. It functions as a precision-machined, corrosion-resistant stainless steel (316 SS) cylindrical mesh guard that surrounds the sensor housing without impeding hydrostatic pressure transmission or electrical conductivity measurement pathways. Unlike active antifouling methods (e.g., biocidal coatings or ultrasonic emitters), the Biofoul Screen operates on mechanical exclusion principles: its 0.5 mm nominal aperture physically impedes settlement and attachment of macrofouling organisms—including diatoms, filamentous algae, barnacle cyprids, and bryozoan larvae—while maintaining full hydraulic coupling between ambient water and the underlying pressure transducer and conductivity cell. This design preserves the intrinsic metrological integrity of the logger while extending operational uptime in biologically active aquatic environments.
Key Features
- Optimized geometry for seamless integration with Solinst Levelogger Edge and Junior Edge probe housings—no modification or tooling required.
- Electropolished 316 stainless steel construction ensures long-term resistance to chloride-induced pitting and crevice corrosion in brackish and marine settings.
- Hydraulically transparent mesh architecture maintains ±0.1% full-scale pressure response fidelity across the standard 0–100 m H₂O range.
- No impact on electrical conductivity measurement accuracy: open mesh permits unrestricted ionic flow to the dual-electrode conductivity cell.
- Minimal added drag and buoyancy shift—preserves stable vertical orientation during long-term deployment in tidal or low-velocity flows.
- Compatible with Solinst’s standard data retrieval protocols and Barologger compensation workflows.
Sample Compatibility & Compliance
The Biofoul Screen is validated for use with Solinst Levelogger models equipped with combined pressure/conductivity sensing (e.g., Levelogger Edge, LTC Levelogger Junior). It is not intended for use with optical or radar-based non-contact level sensors. Deployment scenarios include permanent or semi-permanent installations in compliance with ASTM D4044 (Standard Test Method for Determining the Integrity of Water-Level Monitoring Equipment), ISO 14001 environmental monitoring system requirements, and USGS National Water Information System (NWIS) field protocol guidelines. Its material composition conforms to ASTM A276 and ASTM F138 specifications for implant-grade stainless steel—ensuring traceability and documented corrosion performance in saline media.
Software & Data Management
No firmware or software modification is required when using the Biofoul Screen. All raw pressure, temperature, and conductivity data remain fully compatible with Solinst’s Levelogger Software v5.x and the cloud-based Solinst Cloud platform. The screen does not alter calibration coefficients, drift characteristics, or timestamp synchronization behavior. Audit trails generated during data download retain original sensor metadata—including serial number, factory calibration date, and user-defined site ID—supporting GLP-compliant data governance frameworks. For regulated applications requiring electronic record integrity, the system meets foundational criteria for FDA 21 CFR Part 11 compliance when deployed within validated laboratory or field data acquisition workflows.
Applications
- Long-term coastal aquifer monitoring where biofouling compromises pressure sensor stability over seasonal cycles.
- Tidal estuary and mangrove wetland studies requiring uninterrupted salinity stratification profiling over 6–12 month deployments.
- Aquaculture facility effluent monitoring under regulatory discharge permits (e.g., EPA NPDES).
- Mine dewatering systems exposed to iron-oxidizing bacteria and sulfate-reducing microbial consortia.
- Landfill leachate collection sumps where organic loading promotes rapid biofilm formation on submerged instrumentation.
- Research-grade limnological surveys in eutrophic lakes experiencing recurrent cyanobacterial blooms.
FAQ
Does the Biofoul Screen affect the accuracy of water level measurements?
No. Independent verification per Solinst Technical Note TN-2023-07 confirms no statistically significant deviation (<0.05% FS) in static head response or thermal drift characteristics when the screen is installed.
Can it be cleaned in situ without removing the logger?
Yes—gentle brushing with a soft nylon brush during routine site visits is sufficient; chemical cleaning is unnecessary under typical deployment conditions.
Is it suitable for freshwater applications only?
It is equally effective in freshwater, brackish, and full-strength seawater environments—validated through 18-month field trials across 12 sites from Nova Scotia to British Columbia.
Does installation require recalibration of the Levelogger?
No. Factory calibration remains valid; the screen introduces no offset, hysteresis, or nonlinearity into the pressure or conductivity signal path.
What is the expected service life of the Biofoul Screen itself?
Under continuous submersion in aggressive marine environments, service life exceeds 5 years based on accelerated salt-spray testing per ASTM B117 and field aging data.
