TimePower TP150 Online Dissolved Oxygen Analyzer
| Brand | TimePower |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | Domestic (China) |
| Model | TP150 |
| Pricing | Upon Request |
Overview
The TimePower TP150 Online Dissolved Oxygen Analyzer is a high-precision, ppb-level electrochemical analyzer engineered for continuous monitoring of dissolved oxygen (DO) in ultra-pure water systems—specifically boiler feedwater, condensate, and demineralized water loops in power generation, semiconductor manufacturing, and pharmaceutical utilities. It operates on the pulsed polarographic (Clark-type) principle: a noble metal cathode and silver/silver chloride reference electrode generate a diffusion-limited current proportional to molecular oxygen concentration across a gas-permeable membrane. Unlike conventional galvanic sensors, the TP150 employs a digitally controlled DC + pulsed polarization voltage, significantly reducing cathode polarization drift and improving long-term stability at sub-ppb levels (<10 µg/L). Its robust single-board architecture eliminates mechanical potentiometers and rotary switches, minimizing calibration drift and field maintenance requirements. Designed for 24/7 unattended operation, the instrument meets the stringent environmental and electromagnetic compatibility demands of industrial control rooms and on-line process skids.
Key Features
- True ppb-range measurement capability: 0–100.0 µg/L and 0–20.0 mg/L dual-range auto-switching with automatic temperature compensation (0–60 °C)
- Pulsed polarographic detection with optimized cathode polarization waveform—enhances signal-to-noise ratio and suppresses zero drift
- Advanced digital signal processing algorithms that decouple membrane deformation, flow rate fluctuations, and thermal transients from the DO reading
- Premounted, long-life gas-permeable membrane assembly—field-replaceable without recalibration
- EMC/RFI compliance per EN 50081-2 (emissions) and EN 50082-2 (immunity), ensuring reliable operation in electrically noisy plant environments
- Dual isolated analog outputs: user-configurable 0–10 mA or 4–20 mA (two channels optional); alarm relay rated AC 220 V / 3 A with programmable hysteresis
- Isolated RS485 Modbus RTU interface (optional) for integration into DCS, SCADA, or PLC-based monitoring systems
- Embedded real-time clock enabling time-stamped data logging, audit-ready event tracking, and GLP-compliant timestamping of calibrations and alarms
Sample Compatibility & Compliance
The TP150 supports multiple installation configurations—including flow-through cells, immersion probes, flanged housings, and inline pipe mounts—to accommodate diverse sampling points in high-purity water circuits. It is compatible with both balanced (zero-oxygen reference) and polarographic (oxygen-sensitive) electrode variants (e.g., TP150-001). The analyzer complies with key industry-relevant standards: ASTM D888 (standard test method for dissolved oxygen in water), ISO 5814 (electrochemical determination of dissolved oxygen), and USP (for purified water and water for injection). Its password-protected parameter configuration and non-volatile memory (>10-year data retention) support adherence to FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed in regulated GMP environments.
Software & Data Management
The TP150 features embedded firmware with full local data management: one-month continuous historical logging at 5-minute intervals (8,640 data points), plus a 200-entry event log capturing calibration actions, alarm triggers, and configuration changes. All timestamps are synchronized to the internal RTC and preserved across power cycles. Optional PC software (via RS485) enables export of CSV-formatted datasets for trend analysis, validation reports, and PQ/OQ documentation. Audit trails include operator ID (via login), action type, timestamp, and pre-/post-change values—essential for quality system traceability under ISO 9001, ISO 13485, or ICH Q7 frameworks.
Applications
- Real-time DO monitoring in thermal power plant boiler feedwater and turbine condensate systems to prevent oxidative corrosion of carbon steel and copper alloys
- Final polishing loop verification in pharmaceutical water-for-injection (WFI) and pure steam generation systems
- Monitoring of ultrapure water (UPW) distribution networks in semiconductor fabs where DO > 5 µg/L may induce particle nucleation or wafer surface oxidation
- Validation and routine surveillance of deaerator performance and hydrazine/ammonia dosing efficiency
- Continuous compliance tracking against EP/USP pharmacopeial limits for dissolved oxygen in purified water systems
FAQ
What electrode types are supported by the TP150?
The TP150 is compatible with both polarographic (e.g., TP150-001) and balanced reference electrodes, allowing flexibility for zero-oxygen baseline verification or standard ppb-level measurement.
Does the instrument support automatic temperature compensation?
Yes—automatic temperature compensation is applied across 0–60 °C using an integrated Pt1000 sensor; manual override is also available.
Can the TP150 be integrated into a DCS or central monitoring system?
Yes—via isolated RS485 Modbus RTU (optional) or dual 4–20 mA analog outputs with configurable scaling and fault signaling.
How is calibration traceability maintained?
All calibrations are logged with timestamp, operator ID (if authenticated), and pre/post-calibration values; memory retention exceeds 10 years without power.
What is the IP rating and typical mounting configuration?
The enclosure meets IP65 ingress protection; secondary mounting options include panel cutout (138 × 138 mm), wall-mount, rack-mount, and pipe-clamp configurations.
