Model 181 Integrated Multi-Parameter Laboratory Analyzer
The Digital pH, Conductivity & Temperature Meter Model 181 is an elegant, rugged, and economical instrument designed for fast and accurate measurement of three critical parameters in a single, robust device. Engineered with sophisticated solid-state IC circuitry, this versatile laboratory analyzer delivers precise readings for pH, conductivity, and temperature across diverse applications, including natural water quality assessment, wastewater analysis, agricultural soil testing, and industrial process control. By combining triple parameter testing functionality, it serves as an ideal three-in-one solution that streamlines workflows, optimizes laboratory bench space, and reduces equipment costs for environmental testing, pollution control, public health engineering, and industrial quality departments.
The Model 181 features a crystal clear, high-visibility 3½ digit seven-segment bright red LED display, ensuring excellent reading visibility even in challenging laboratory environments. Its advanced input stage boasts an ultra-high input impedance of >10¹² ohms, preventing sample disturbance during sensitive pH measurements. The instrument is adapted for diverse industrial applications, offering high-precision pH analysis (full 0-14 pH range with 0.01 resolution), reliable conductivity testing (up to 20 ppt), and precise temperature monitoring (0-100°C range with 0.1°C resolution) using a premium RTD (PT-100) sensor. With practical maintenance and regular calibration using standard buffer solutions, the Model 181 provides dependable, long-term measurement performance.
Technical Specifications
| Parameter / Feature | Details |
|---|---|
| Product Type | Digital pH, Conductivity & Temperature Meter |
| Model | 181 |
| Triple Parameter Measurement | pH, Conductivity, Temperature (PT-100 RTD) |
| pH Measurement Range | 0 to 14 pH |
| pH Resolution / Accuracy | 0.01 pH / ±0.01 pH ± 1 Digit |
| pH Input Impedance | > 10¹² ohms (preventing sample loading) |
| Conductivity Measurement Range | 0 to 20 ppt (2 ranges) |
| Conductivity Resolution / Accuracy | 1 ppt / ± 0.5% of Range ± 1 digit |
| Cell Constant Adjustment | 0.2 to 1.8 adjustable directly on digital display |
| Temperature Measurement Range | 0 to 100°C |
| Temperature Resolution / Accuracy | 0.1°C / ±0.2% ± 1 digit |
| Temperature Sensor Technology | Precision RTD (PT-100) sensor |
| Temperature Compensation (Manual) | pH: 0-100°C; Conductivity: 0-50°C (from Temp Table at 25°C) |
| Display Type | 3½ digitseven-segment high-visibility bright red LED display |
| Electronic Design | Solid-state IC circuitry with low drift components |
| Integrated oscillator | Built-in 1 kHz oscillator for conductivity measurement |
| Durable Housing | Robust design for long-term laboratory use |
| Standard Power Supply | 220V AC ±10%, 50 Hz |
Core Features & User Benefits
The Model 181 Multi-Parameter Meter delivers comprehensive water quality analysis through integrated functionality, sophisticated circuitry, and durable construction.
- Triple Parameter Measurement in One Device Consolidates pH, conductivity, and temperature testing into a single economical instrument. This three-in-one functionality replaces multiple single-parameter devices, streamlining workflows while significantly reducing laboratory equipment footprint and acquisition costs.
- High-Precision pH Analysis Stage Delivers professional-grade pH testing capability with a full 0-14 range, precise 0.01 resolution, and ±0.01 pH accuracy. The high input impedance of >10¹² ohms ensures accurate pH measurement without sample loading effects, preventing cross-contamination risks or inconsistent readings.
- Reliable Conductivity Testing with Dual Ranges Features dependable conductivity testing up to 20 ppt via two selectable ranges with ±0.5% accuracy. The integrated 1 kHz oscillator and adjustable cell constant (0.2-1.8) directly readable on the digital display provide maximum versatility for dissolved solid analysis across diverse applications.
- Advanced Electronic Circuitry for Consistency Incorporates modern solid-state IC circuitry carefully engineered for measurement stability and long-term reliability. Precision low drift components minimize signal drift, ensuring consistent performance for routine quality control in manufacturing facilities or research centers.
- High-Visibility Crystal Clear Display Equipped with a crisp 3½ digitseven-segment bright red LED display. This high-contrast interface provides excellent reading visibility from across the laboratory bench, improving operational advantages and reducing error rates during routine measurements.
- Integrated Temperature Monitoring and Compensation Utilizes a precision RTD (PT-100) sensor for wide 0-100°C temperature measurement with 0.1°C resolution. This accurate reading serves as the critical basis for essential temperature compensation calculations (pH 0-100°C manual; conductivity 0-50°C), ensuring reliable parameter corrections in changing environments.
Frequently Asked Questions (FAQ)
What critical water quality parameters can the Digital pH, Conductivity & Temperature Meter Model 181 measure?
The Digital pH, Conductivity & Temperature Meter Model 181 is an elegant, rugged, and economical instrument designed for fast and accurate measurement of three critical parameters in a single robust device. It delivers precise, integrated readings for pH, conductivity, and temperature, making it ideal for comprehensive water quality assessment, wastewater analysis, and industrial process control.
Does the Model 181 multi-parameter meter connect multiple single-parameter instruments?
Yes, the Model 181 consolidates three essential laboratory measurements into a single economical instrument. This powerful three-in-one functionality streamlines workflows, eliminates the need for separate meters, and optimizes laboratory footprint, allowing users to measure related parameters without changing instruments.
What is the measurement range and precision of the pH analysis stage in this meter?
The Model 181 provides comprehensive, high-precision pH analysis. It covers the full **0-14 pH** range with **0.01 pH resolution** and **±0.01 pH accuracy**. An ultra-high input impedance of **>10¹² ohms** ensures accurate pH measurement without disturbing sensitive samples during critical scientific testing protocols.
Can I adjust the conductivity cell constant on the digital display, and what is the maximum range?
Yes, the Model 181 conductivity measurement capabilities allow direct digital adjustment of the cell constant (0.2-1.8) on the main display interface. It features **dual-range capability** to measure dissolved solids up to **20 ppt** with **±0.5% precision** for consistent performance in various water monitoring or industrial wastewater analysis.
What type of temperature sensor technology does the Lutron GCH-2018 multi-parameter meter include?
The **Digital pH, Conductivity & Temperature Meter Model 181** employs a premium **RTD (PT-100)** sensor technology. This sensor provides wide **0-100°C** temperature measurement with **0.1°C resolution** and serve as the accurate reference basis for manual **temperature compensation** for both pH and conductivity analysis.
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