Silicon Dioxide Analyzer HD-TSi by Horde Electric
| Brand | Horde Electric |
|---|---|
| Model | HD-TSi |
| Type | Laboratory Water Quality Analyzer |
| Detection Parameter | Silica (SiO₂) |
| Measurement Principle | Colorimetric Spectrophotometry (based on molybdate blue method per standard methods) |
| Wavelengths | 420 nm, 470 nm, 520 nm, 560 nm, 620 nm, 700 nm |
| Measuring Range | 0–25 mg/L (segmented), LOD: 0.01 mg/L |
| Accuracy | ±5% FS |
| Photometric Stability | ≤0.002 A drift within 20 min |
| Repeatability | <0.5% RSD |
| Optical Source | Imported high-brightness LED with auto-calibration |
| Cuvette Compatibility | 10 mm, 30 mm, 50 mm rectangular cuvettes and φ16 mm round tubes |
| Display | 8-inch color TFT-LCD touchscreen (1024×768) |
| OS | Android 7.1.1 |
| Data Storage | 8 million records with time-stamped retrieval |
| Connectivity | Wi-Fi, RJ45, Bluetooth, mobile hotspot, USB 2.0, HDMI |
| Cloud Integration | Regulatory compliance platform support (local environmental authority APIs) |
| Power Supply | AC 220 V ±10%, 50 Hz |
| Dimensions | 367 × 243 × 125 mm |
| Weight | 5.3 kg |
| Operating Environment | 5–40 °C, RH <85% (non-condensing) |
| Certifications | Compliant with Chinese national standard for silica determination (GB/T 11893–1989 or equivalent spectrophotometric method) |
Overview
The HD-TSi Silicon Dioxide Analyzer is a dedicated laboratory-grade spectrophotometric instrument engineered for precise quantification of dissolved silica (SiO₂) in water matrices. It operates on the established molybdate blue colorimetric principle—where orthosilicic acid reacts with ammonium molybdate under acidic conditions to form a phosphomolybdosilicic heteropoly acid, subsequently reduced to yield a stable blue chromophore measurable at defined visible wavelengths (e.g., 620 nm or 700 nm). This method aligns with internationally recognized protocols including GB/T 11893–1989 (China), APHA Standard Methods 4500-Si D, and ISO 15304:2003 for silica in natural and treated waters. Designed for regulatory-grade routine analysis, the HD-TSi delivers trace-level sensitivity (LOD: 0.01 mg/L) across a segmented 0–25 mg/L dynamic range, making it suitable for monitoring low-silica boiler feedwater, high-silica geothermal effluents, and process waters in power generation, semiconductor manufacturing, and municipal treatment facilities.
Key Features
- Multi-wavelength LED optical system (420–700 nm) with factory-calibrated, temperature-compensated light sources ensuring long-term photometric integrity (>100,000 h LED lifetime)
- Modular cuvette chamber supporting standardized pathlengths (10/30/50 mm) and φ16 mm round tube formats—enabling method flexibility per ASTM D859 or EPA 375.1 requirements
- 8-inch high-resolution capacitive touchscreen running Android 7.1.1 OS, offering responsive GUI navigation, bilingual (EN/CN) interface, and embedded procedural video guidance
- Onboard thermal line printer with QR-code generation capability for audit-ready hardcopy reporting
- Integrated data governance architecture: time-stamped storage of 8 million test records with SQL-like temporal search, exportable to .xlsx via USB or cloud sync
- Dual-network stack (Wi-Fi + RJ45) with TLS-secured HTTP(S) API endpoints for seamless integration into regional environmental monitoring platforms (e.g., China MEP’s Online Monitoring System)
- Field-deployable design with optional 6 Ah rechargeable Li-ion battery, enabling uninterrupted operation during mobile sampling campaigns or emergency response scenarios
Sample Compatibility & Compliance
The HD-TSi is validated for use with clarified, filtered, or digested aqueous samples—including raw surface water, wastewater effluent, cooling tower blowdown, desalination brine, and ultrapure process water. Sample turbidity must be <5 NTU prior to analysis to avoid scattering interference; optional integrated filtration module (sold separately) supports ISO 7027-compliant pretreatment. The analyzer conforms to GLP documentation standards through automated metadata capture (operator ID, sample ID, reagent lot, calibration timestamp). Its firmware architecture supports 21 CFR Part 11–compliant electronic signatures when deployed in regulated QA/QC environments, and all measurement logs include cryptographic hash verification for data integrity assurance.
Software & Data Management
Firmware v3.2+ provides full local data lifecycle control: real-time graphing (absorbance vs. concentration), multi-curve calibration management (3 preloaded NIST-traceable curves + unlimited user-defined curves), and batch statistical reporting (mean, SD, CV%). Data export supports CSV, Excel (.xlsx), and PDF formats—with configurable report templates including QA/QC flags (e.g., blank drift warning, calibration expiration alert). Cloud synchronization employs OAuth 2.0 authentication and AES-256 encryption; uploaded datasets are tagged with ISO 8601 timestamps and geolocation metadata (if enabled via connected GNSS module). Remote firmware updates are delivered over-the-air with SHA-256 signature validation.
Applications
- Power plant chemistry control: Silica monitoring in condensate, feedwater, and steam cycles to prevent turbine blade deposition per EPRI guidelines
- Municipal wastewater compliance: Quantification of soluble silica in tertiary effluent prior to discharge into sensitive aquatic ecosystems
- Industrial process water management: Real-time tracking in pharmaceutical water-for-injection (WFI) systems and semiconductor rinse water loops
- Environmental field surveys: Mobile assessment of silicate weathering rates in river basins and groundwater aquifers
- Educational laboratories: Teaching spectral analysis fundamentals, Beer–Lambert law validation, and method validation protocols (accuracy, precision, LOD/LOQ)
FAQ
What silica species does the HD-TSi measure?
It quantifies total reactive (dissolved) silica—primarily orthosilicic acid [Si(OH)₄]—as defined by standard colorimetric methods. Polymeric or colloidal silica requires acid hydrolysis pretreatment.
Is the instrument compatible with third-party LIMS systems?
Yes—via RESTful API over HTTP/S using JSON payloads; schema documentation and Postman collection are provided upon request.
How often does the optical system require recalibration?
Factory calibration remains stable for ≥12 months under normal lab conditions; annual verification against NIST SRM 1643e is recommended.
Can the HD-TSi perform multi-parameter analysis beyond silica?
No—it is purpose-built for silica only. However, its modular optical architecture allows future hardware upgrades for additional parameters (e.g., nitrate, phosphate) subject to regulatory revalidation.
Does the device meet IP rating requirements for humid laboratory environments?
It carries an IP20 rating (IEC 60529); for high-humidity or splash-prone areas, optional polycarbonate splash guard kit is available (IPX4 certified).
