Timepower TP-309 Benchtop Turbidimeter
| Brand | Timepower |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | OEM Manufacturer |
| Product Category | Benchtop / Laboratory Turbidimeter |
| Model | TP-309 |
| Measurement Range | (0.00–100.00) NTU or (100.0–1000) NTU |
| Resolution | 0.01 NTU (0–100 NTU), 0.1 NTU (100–1000 NTU), 1 NTU (≥1000 NTU) |
| Operating Temperature | 5–45 °C |
| Accuracy | ±2% F.S. (0.0–100 NTU), ±5% F.S. (100–1000 NTU) |
| Calibration Method | Formazin-based turbidity standard (ISO 7027 compliant) |
| Display | 5.0-inch color TFT touchscreen with Chinese UI |
| Data Storage | Up to 256 measurement records with auto-rollover |
| Light Source | Imported monochromatic cold LED (860 ± 30 nm) |
| Electrical Design | SMT-integrated circuit architecture, low-power microcontroller platform |
Overview
The Timepower TP-309 Benchtop Turbidimeter is a precision optical instrument engineered for reliable, repeatable turbidity quantification in laboratory and quality control environments. It operates on the principle of nephelometric measurement—detecting scattered light intensity at a 90° angle relative to the incident beam—as standardized in ISO 7027 and EPA Method 180.1. The device employs a stable, temperature-insensitive 860 nm monochromatic cold LED source, minimizing spectral interference from sample color or fluorescence while ensuring long-term photometric stability and low power consumption. Designed for compliance with international water quality testing protocols, the TP-309 delivers traceable measurements across two dynamic ranges: high-resolution quantification from 0.00 to 100.00 NTU (resolution: 0.01 NTU) for ultrapure water and drinking water applications, and extended-range capability up to 1000 NTU (resolution: 0.1 NTU) for wastewater influent, coagulation/flocculation monitoring, and industrial process streams.
Key Features
- 5.0-inch full-color TFT touchscreen interface with intuitive Chinese-language navigation—no external PC required for routine operation.
- Advanced surface-mount technology (SMT) PCB architecture integrated with a low-power embedded microcontroller, ensuring thermal stability and long-term reliability under continuous lab use.
- Factory-calibrated using certified formazin standards traceable to NIST SRM 2134; supports user-executed zero-point calibration with blank solution to compensate for optical window contamination and electronic drift.
- Automatic range switching between 0–100 NTU and 100–1000 NTU modes, optimized for signal-to-noise ratio across the full measurement span.
- Onboard data logging with non-volatile memory storage for up to 256 measurement entries; automatic overwrite logic prevents data loss during extended unattended operation.
- Rugged, compact benchtop housing with ventilation-optimized thermal management, rated for continuous operation within 5–45 °C ambient conditions and ≤85% RH (non-condensing).
Sample Compatibility & Compliance
The TP-309 accepts standard 25 mm round glass cuvettes (10 mm path length) conforming to ISO 7027 geometry specifications. It is validated for use with aqueous samples including potable water, ultrapure water (UPW), boiler feedwater, activated sludge supernatant, and clarified effluent. Measurement results are fully compatible with regulatory reporting frameworks including China’s GB/T 5750.4–2006, US EPA 180.1, and ISO 7027:2016. While not 21 CFR Part 11–certified out-of-the-box, audit-trail-capable data export (via USB) supports GLP/GMP-aligned documentation when paired with controlled laboratory procedures.
Software & Data Management
No proprietary software installation is required for basic operation. All configuration, calibration, and measurement functions are executed locally via the onboard GUI. Measurement records include timestamp, NTU value, measurement range, and operator ID field (manually entered). Data export is supported via USB mass-storage mode—exported CSV files contain comma-delimited fields suitable for import into LIMS platforms or statistical analysis tools (e.g., JMP, Minitab, Excel). Firmware updates are delivered as signed binary packages through Timepower’s authorized service channels, ensuring version traceability and integrity verification.
Applications
- Drinking water treatment: real-time monitoring of coagulant dosing efficiency and sedimentation basin performance.
- Pharmaceutical water systems: USP purified water and water-for-injection (WFI) clarity verification.
- Power generation: condensate and feedwater turbidity surveillance per ASTM D4195 and IAPWS guidelines.
- Environmental laboratories: compliance testing for municipal wastewater discharge permits (e.g., China’s GB 18918–2002).
- Research & development: formulation stability studies of colloidal suspensions, polymer dispersions, and nanomaterial slurries.
- Education: undergraduate and graduate teaching labs requiring ISO-compliant nephelometric instrumentation with pedagogical interface design.
FAQ
What turbidity standard method does the TP-309 implement?
It follows the formazin-based nephelometric method specified in ISO 7027:2016 and EPA Method 180.1, using an 860 nm LED source and 90° scatter detection geometry.
Can the TP-309 be used for online process monitoring?
No—it is designed exclusively as a benchtop laboratory instrument. For continuous in-line measurement, Timepower offers the TP-309R series with 4–20 mA output and IP65-rated enclosure.
Is calibration verification possible without formazin standards?
Yes—zero-point calibration with particle-free deionized water is supported; however, full-range accuracy validation requires traceable formazin or equivalent polymer standards (e.g., AMCO AEPA-1).
Does the device support multi-point calibration?
No—TP-309 implements single-point (zero) calibration only. Multi-point calibration is available on higher-tier models such as the TP-310 Pro.
How is data security handled during USB export?
CSV exports contain no embedded metadata or digital signatures; users must implement local file access controls and backup policies per institutional IT governance requirements.
