Model 181 EI-DVI Digital 3-in-1 Benchtop Meter – Multi-Parameter pH/EC/Temp Analyzer
The Model 181 EI-DVI Digital pH, Conductivity & Temperature Meter is an elegant, rugged, and economical multi-parameter benchtop instrument designed specifically for fast and accurate analytical testing. Engineered as a consolidated laboratory solution, this rugged combo meter provides simultaneous and highly stable measurement of three critical variables: acidity/alkalinity (pH), ionic content (conductivity), and solution temperature.
Utilizing state-of-the-art solid-state Integrated Circuit (IC) circuitry, the multi-parameter Model 181 offers unparalleled versatility and reliability for complex analytical tasks in demanding industrial and laboratory environments. Users receive immediate data visualization on the bright red, 3½ digit, seven-segment LED display, optimized for high visibility under variable lab lighting conditions.
For versatile applications across water analysis, chemical laboratories, industrial process control, and agricultural soil testing, the Model 181 includes sophisticated calibration options designed to enhance measurement reliability. The pH system utilizes high input impedance (>10¹² ohms) to minimize electrical loading effects, while the conductivity framework features a flexible cell constant adjustment facility (0.2 – 1.8) designed to provide flexibility for various conductivity probes and match specific probe characteristics precisely.
Model 181 Technical Specifications
| Feature/Parameter | Specification |
|---|---|
| Model Number | Model 181 EI-DVI |
| Display | 3½ Digit Bright Red LED (7-Segment) |
| Circuitry | Solid State IC (Integrated Circuit) |
| Power Supply | 220V/230V AC ± 10%, 50 Hz |
| Approx. Weight | 2.5 Kg (Approximate casing weight) |
| pH Measurement | |
| Range | 0 – 14 pH |
| Resolution | 0.01 pH |
| Accuracy | ± 0.01 pH ± 1 Digit |
| Input Impedance | > 10¹² ohms |
| Temp. Compensation | Manual: 0 – 100 °C |
| Slope Correction | 80 – 120 % |
| Conductivity Measurement | |
| Range | 0 – 20 mS/cm in 2 ranges (or 0 – 20 ppt in 2 ranges) |
| Resolution | 1 µS/cm (or 1 ppt) |
| Accuracy | ± 0.5% of Range ± 1 digit |
| Oscillator | In-built 1 KHz |
| Cell Constant Adjustment | 0.2 – 1.8 (adjustable facility) |
| Temp. Compensation | Manual: 0 – 50 °C adjustable from temp tables at 25°C |
| Temperature Measurement | |
| Range | 0 – 100 °C |
| Resolution | 0.1 °C |
| Accuracy | ± 0.2% ± 1 digit |
| Sensor Type | Semi-Conductor Type / RTD PT-100 listed |
Core Features & Multi-Parameter Benefits
- Simultaneous 3-in-1 Analysis Consolidates pH, Conductivity, and Temperature testing in a single benchtop instrument, optimizing valuable laboratory space and streamlining simultaneous analytical workflows for multi-parameter water analysis.
- Solid State IC Reliability Features advanced solid-state integrated circuit (IC) circuitry, providing exceptional measurement stability, high accuracy, and ruggged long-term performance Designed for Demanding Industrial use.
- High-Visibility Red LED Display Outfitted with a bright 3½ digit seven-segment LED screen that ensures clear reading of critical parameters from a distance, even in poorly lit industrial process control settings.
- Adjustable Cell Constant Facility Provides a built-in facility for adjusting the conductivity cell constant (0.2 – 1.8), offering flexibility for various conductivity probes and enhance accurate measurement of ionic content (conductivity) in shifting solutions.
- Temperature Compensation Models Offers independent manual temperature compensation protocols for pH (0-100°C) and conductivity (0-50°C), guaranteeing multi-parameter pH temperature reliability Designed to provide flexibility across variable testing conditions.
- Rugged Benchtop Design Built with an elegant yet rugged casing optimized for durability, providing a versatile and reliable combination meter solution for agricultural soil labs, wastewater testing, and general chemical analysis.
Frequently Asked Questions & Technical Support Strategy
What critical analytical parameters can the Model 181 benchtop meter analyze simultaneously?
The **Model 181 EI-DVI multi-parameter benchtop meter** performs concurrent, fast, and accurate analytical testing of three critical parameters: pH (acidity/alkalinity), Conductivity (ionic content), and Temperature. It consolidates water quality analysis, chemical solutions monitoring, and environmental testing onto a single rugged instrument Designed to provide flexibility.
This economical combination meter utilizes solid-state IC circuitry to provide highly stable measurements across wide standard ranges suitable for soil pH analysis, industrial process control, and boilerplate water testing Designed for Demanding Industrial settings.
How does the adjustable cell constant facility enhance conductivity measurement reliability?
The **Model 181 multi-parameter benchtop meter** features an integrated cell constant adjustment facility (0.2 – 1.8). This allows operators to match the instrument's conductivity measurement perfectly with various conductivity probes of shifting characteristics. It enhances accuracy when testing sea water, natural water Works metrics, or complex brine solutions.
This adjustment facility provides flexibility Designed to provide flexibility for agricultural testing labs analyzing nutrient solutions and environmental engineering teams monitoring treated or waste water with rugged and reliable design parameters.
What is the advantage of high input impedance in pH temperature reliability testing?
The **Model 181 multi-parameter benchtop meter** utilizes high input impedance (>10¹² ohms) within its pH measurement IC circuitry. This minimizes electrical loading effects on standard pH electrodes, ensuring superior measurement reliability, high accuracy, and rapid stabilization when determining soil pH or monitoring chemical solution alkalinity.
Designed for multi-parameter pH temperature reliability testing, this robust instrument combines manual temperature compensation for both pH and Conductivity measurement Designed for Demanding Industrial uses.
How does the bright red LED display support varied laboratory environments?
The **Model 181 multi-parameter benchtop meter** is outfitted with a high-visibility 3½ digit seven-segment red LED display. This bright seven segment display ensures clear readings of critical water Works metrics or chemical solution parameters Designed for Demanding Industrial lighting.
This rugged and reliable design feature maintains operational visibility in busy wastewater treatment plants, industrial process control centers, agriculture labs, and public health engineering spaces, optimizing combination meter performance for versatile applications.
What maintenance is required for the Model 181 combination multi-parameter analytical meter?
The **Model 181 multi-parameter benchtop meter** features solid state integrated circuit circuitry requiring minimal internal maintenance. Regular maintenance focusing on multi-parameter water analysis reliability involves ensuring stable calibration (using its slope correction facility 80-120%) and standard electrode cleaning curves Designed to maintain multi-parameter combination meter reliability.
The cell constant adjustment facility and multi-parameter manual temperature compensation modes should be validated based on Temp table standards at 25°C when analyzing critical agricultural testing variables or chemical lab solution attributes.
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