TimePower TP309/TP3118 Benchtop Turbidimeter
| Brand | TimePower |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | TP309 / TP3118 |
| Form Factor | Benchtop / Laboratory |
| Measurement Range | 0.0–100.0 NTU or 100.0–1000 NTU |
| Resolution | 0.01 NTU |
| Operating Ambient Temperature | 5–45 °C |
| Accuracy | ±2% F.S. (0–100 NTU), ±5% F.S. (100–1000 NTU) |
Overview
The TimePower TP309/TP3118 Benchtop Turbidimeter is a precision optical instrument engineered for reliable, repeatable turbidity measurement in laboratory and quality control environments. It operates on the principle of nephelometry—measuring the intensity of light scattered at 90° by suspended particulate matter in aqueous samples. Unlike absorption-based photometric methods, this design minimizes interference from sample coloration or background absorbance, ensuring high specificity for turbidity quantification. The instrument complies with ISO 7027:2016 (optical method using infrared LED at 860 nm) and aligns with EPA Method 180.1 and Standard Methods 2130B for drinking water and wastewater analysis. Its dual-range capability (0.0–100.0 NTU and 100.0–1000 NTU) supports applications across low-turbidity ultrapure water monitoring and high-load industrial effluent characterization.
Key Features
- High-resolution detection with 0.01 NTU resolution across both measurement ranges, enabling trace-level particulate assessment in pharmaceutical-grade water systems.
- Automated timing function for standardized measurement intervals—reducing operator dependency and improving inter-laboratory reproducibility.
- Stable optical architecture incorporating an 860 nm infrared LED light source and matched silicon photodetector, minimizing chromatic interference from yellow/brown-colored samples.
- Rugged benchtop housing designed for continuous operation in QC labs; thermal management ensures stable performance across the full 5–45 °C ambient operating range.
- Factory-calibrated with NIST-traceable formazin standards; user-accessible calibration routines support routine blank verification and multi-point curve validation.
Sample Compatibility & Compliance
The TP309/TP3118 accommodates standard 25 mm round glass cuvettes (10 mm path length) and is compatible with deionized water, potable water, process cooling water, semiconductor rinse water, biopharmaceutical buffers, and municipal wastewater effluents. It meets regulatory expectations for routine turbidity monitoring under USP , ASTM D6508-22 (for purified water), and ISO 7027-1:2016. While not inherently 21 CFR Part 11 compliant, its audit-ready calibration log structure—including timestamped blank checks and curve updates—supports GLP/GMP documentation requirements when integrated into validated lab workflows.
Software & Data Management
Data output is via RS-232 serial interface (optional USB-to-serial adapter supported), enabling direct integration with LIMS or custom data acquisition platforms. The instrument stores up to 200 measurement records locally with time/date stamps. Calibration history—including date, operator ID (manually entered), and reference standard lot numbers—is retained separately. For regulated environments, users are advised to implement external electronic lab notebooks (ELN) or validated spreadsheet templates to satisfy ALCOA+ data integrity principles.
Applications
- Monitoring feedwater and condensate purity in thermal power generation plants per ASTM D4582.
- Verifying final rinse clarity in semiconductor wafer cleaning processes (SEMI F57).
- QC release testing of purified water (PW) and water for injection (WFI) in FDA-registered pharmaceutical facilities.
- Turbidity profiling in activated sludge systems and membrane bioreactor (MBR) effluent streams.
- Batch consistency verification for colloidal suspensions in chemical synthesis and polymer manufacturing.
FAQ
How often should I perform blank calibration?
A blank calibration is required daily before initiating measurements to compensate for cuvette variability and optical baseline drift.
What is the recommended frequency for full calibration curve verification?
A multi-point calibration using certified formazin standards (e.g., 0.1, 10, 100, and 500 NTU) is recommended every two weeks—or after any maintenance event affecting optics or electronics.
Can the instrument measure colored samples accurately?
Yes—the 860 nm infrared detection wavelength significantly reduces interference from organic colorants (e.g., humic substances), making it suitable for wastewater and industrial process streams.
Is the device suitable for ultrapure water (UPW) applications?
Within the 0.0–100.0 NTU range, the 0.01 NTU resolution supports UPW monitoring per SEMI F63 and ASTM D5127, though sub-0.05 NTU measurements require dedicated low-turbidity analyzers with enhanced signal-to-noise architecture.
Does the instrument include regulatory-compliant audit trails?
No built-in electronic audit trail is provided; however, all calibration and measurement metadata can be exported for manual inclusion in validated documentation systems compliant with 21 CFR Part 11 Annex 11 requirements.
