Palintest LTH090WS TE Professional Turbidimeter
| Brand | Palintest |
|---|---|
| Origin | United Kingdom |
| Model | LTH090WS |
| Type | Portable Turbidimeter |
| Measurement Range | 0.01–1000 NTU |
| Resolution | 0.01 NTU (0.01–9.99 NTU), 0.1 NTU (10.0–99.9 NTU), 1 NTU (100–1000 NTU) |
| Accuracy | ±2% |
| Stray Light | <0.02 NTU |
| Repeatability | ±1% or ±0.01 NTU (whichever is greater) |
| Operating Temperature | 0–40 °C |
| Sample Volume | 10 mL |
| Display | 800×480-pixel capacitive touchscreen IPS panel |
| Protection Rating | IP67 dust/water resistant, IK08 impact resistant |
| Data Storage | 5,000 measurements (including 1,000 detailed records with timestamp, operator ID, and metadata) |
| Connectivity | Wi-Fi, Bluetooth 5.0, USB-C |
| Power | Rechargeable Li-ion battery (USB-C charging), supports ≥2,500 measurements per full charge |
| Calibration | 3-point calibration using SDVB or formazin standards |
| Compliant with ISO 7027 | 2016 (860 nm infrared LED light source) |
| Units | NTU, FTU, FAU |
| Measurement Modes | Rapid, Average, Continuous |
| Response Time | <7 seconds per reading |
Overview
The Palintest LTH090WS TE Professional Turbidimeter is an ISO 7027:2016-compliant portable instrument engineered for high-precision turbidity measurement in field and laboratory environments. It employs a stable 860 nm infrared LED light source to minimize color interference and eliminate spectral sensitivity to sample hue—critical for reliable quantification across diverse water matrices. Based on the nephelometric principle, the instrument detects scattered light at 90° relative to the incident beam path, ensuring trace-level sensitivity down to 0.01 NTU while maintaining linearity up to 1000 NTU. Its optical architecture incorporates precision-machined quartz cuvette holders, temperature-compensated photodetectors, and proprietary stray-light suppression optics (<0.02 NTU), enabling robust performance in challenging conditions such as colored, suspended, or low-conductivity samples.
Key Features
- ISO 7027:2016 certified optical design with 860 nm infrared LED source and 90° scatter detection geometry
- True-color IPS touchscreen display (800×480 pixels) supporting glove- and wet-hand operation with intuitive step-by-step visual guidance
- Modular measurement chamber (PT128 optional) for rapid field replacement and contamination control
- Triple-resolution readout logic: 0.01 NTU (0.01–9.99), 0.1 NTU (10.0–99.9), 1 NTU (100–1000) — automatically applied per range segment
- IP67 ingress protection and IK08 mechanical impact resistance for deployment in municipal, industrial, and environmental sites
- Onboard 3-point calibration support using either SDVB reference standards or formazin suspensions, with audit-trail logging of calibration events
- Battery-powered operation (≥2,500 readings per charge) via integrated rechargeable Li-ion cell, charged via USB-C port
Sample Compatibility & Compliance
The LTH090WS is validated for use with potable water, wastewater effluent, process water in food & beverage production, cooling tower fluids, and environmental surface waters. Its optical system mitigates interferences from dissolved organic matter, iron/manganese staining, and particle settling effects through dynamic averaging algorithms and continuous mode stabilization. The instrument meets regulatory requirements for routine monitoring under EPA Method 180.1, ISO 7027, and ASTM D6508. Data integrity complies with GLP and GMP documentation practices: all measurements include timestamp, operator ID (configurable), instrument serial number, calibration status flag, and environmental temperature. Full audit trail export is supported via encrypted Wi-Fi or USB-C transfer.
Software & Data Management
Data handling is managed through Palintest Connect—a secure cloud-enabled desktop and mobile application supporting remote firmware updates, report generation (PDF/CSV), and automated data synchronization. Each of the 5,000 onboard storage slots retains raw NTU values, unit selection (NTU/FTU/FAU), measurement mode, and user-defined metadata fields. Detailed record sets (up to 1,000 entries) embed operator credentials, sample ID, location coordinates (GPS-tagged when paired with compatible mobile device), and calibration verification logs. All communication protocols—including Bluetooth 5.0, Wi-Fi (WPA2-Enterprise capable), and USB-C mass storage mode—are designed to align with FDA 21 CFR Part 11 expectations for electronic records and signatures when deployed in regulated QC/QA workflows.
Applications
- Drinking water quality verification at treatment plant outlets and distribution points
- Process monitoring in breweries, dairies, and soft drink bottling lines where suspended solids affect clarity and shelf life
- Effluent compliance reporting for municipal wastewater facilities (e.g., secondary clarifier discharge)
- Environmental field surveys assessing sediment plume dispersion, stormwater runoff, and lake stratification dynamics
- Pharmaceutical water system validation (PW, WFI) per USP particulate matter guidelines (as a complementary screening tool)
- Educational laboratories requiring traceable, student-accessible turbidity training platforms
FAQ
What standards does the LTH090WS comply with?
It conforms to ISO 7027:2016, EPA Method 180.1, and ASTM D6508 for nephelometric turbidity measurement.
Can the instrument be calibrated without formazin?
Yes—SDVB (Stabilized Dextran-Based Verification) standards are supported as a non-hazardous, shelf-stable alternative to formazin.
Is the measurement chamber user-replaceable in the field?
The PT128 interchangeable measurement chamber is designed for quick swap without tools; replacement takes <30 seconds and requires no recalibration.
How is data security ensured during wireless transmission?
Wi-Fi and Bluetooth connections enforce TLS 1.2 encryption; local USB-C export operates in read-only mass storage mode to prevent accidental firmware overwrite.
Does the instrument support multi-language operation?
Yes—English, Simplified Chinese, and Spanish interfaces are preloaded and selectable within system settings.
