Digital Flame Photometer Model 381 – High-Precision Alkali Metal Analysis System
The Electronics India Digital Flame Photometer Model 381 (deeply integrated within the renowned Deep Vision series as Model EI-DVI) is a premium analytical instrument engineered for high-precision, rapid determination of specific alkali and alkaline earth metals. Purpose-built as an accessible yet scientifically authoritative solution, this clinical and agricultural flame photometer provides highly accurate analysis of Sodium (Na) and Potassium (K) as core operations, with additional modular, optional capabilities for assessing Calcium (Ca) and Lithium (Li) concentrations.
Designed for multi-sector utility across soil testing laboratories, agricultural research facilities, industrial quality control clinics, and academic institutions, the Model 381 splits operational workloads across a specialized dual-component framework. The system consists of an advanced Main Unit coupled with a heavy-duty, oil-free Mini Compressor Unit. By feeding compressed, regulated air through an axial-flow concentric nebulizer, the instrument converts liquid samples into a uniform, fine mist sprayed directly into an optimized gas flame, guaranteeing immaculate flame stability and unmatched analytical reproducibility.
Operating via isolated narrow-band interference glass filters on a convenient rotating disc, the Digital Flame Photometer isolates element-specific atomic emission wavelengths with absolute fidelity. The resulting light falls onto a highly sensitive Silicon Photodiode detector, translating clinical and geochemical interactions into clear parts-per-million (ppm) or meq metrics on a bright 2½ Digit, 7-Segment LED display readout. Complete with a safe electronic auto-ignition system, the Electronics India Model 381 represents the pinnacle of operational simplicity, rugged durability, and technical precision for contemporary analytical workflows.
Technical Specifications
| Parameter / Feature | Details & Engineering Thresholds |
|---|---|
| Model Number | Model 381 (EI-DVI Deep Vision Series) |
| Product Classification | Digital Flame Photometer (Analytical Instrument) |
| Core Elements Measured | Sodium (Na) and Potassium (K) |
| Optional Elements Measured | Calcium (Ca) and Lithium (Li) |
| Measurement Range (Na, K) | 0 – 100 ppm |
| Measurement Range (Ca) | 15 – 100 ppm (Optional capability) |
| Measurement Range (Li) | 10 – 100 ppm (Optional capability) |
| Analytical Sensitivity (Na, K) | 5 ppm |
| Analytical Sensitivity (Ca, Li) | 10 ppm (Optional capability) |
| System Accuracy Limits | ± 2% up to 40 ppm; ± 5% above 40 ppm |
| Instrument Repeatability | ± 2 Counts |
| Display / Readout Type | 2½ Digit, 7-Segment High-Visibility LED Readout |
| Optical Sensor Type | High-Sensitivity Silicon Photodiode Detector |
| Wavelength Isolation System | Narrow band interference glass filters mounted on rotating disc |
| Nebulizer Assembly | Black bakelite, axial flow type, concentric non-corrosive structure |
| Flame System Requirements | Liquid Petroleum Gas (LPG) mixed with dry oil-free air |
| Air Supply Source | External oil-free mini compressor unit equipped with an active pressure regulator |
| Combustion Control Matrix | LPG gas stream controlled via built-in precision regulator valve |
| Ignition Protocol | In-built electronic auto-ignition mechanism activated by a single panel switch |
| Equipment Warm-Up Duration | 10 Minutes |
| Power Supply Profile | 230 V ± 10% AC, 50 Hz Single Phase Supply |
| Approximate Power Consumption | 10 Watts (W) |
| Main Unit Scale (L x B x H) | 375 mm x 245 mm x 220 mm (Approx.) |
| Main Unit Net Weight | 7.5 kg (Approx.) |
| Compressor Scale (L x B x H) | 290 mm x 255 mm x 210 mm (Approx.) |
| Compressor Net Weight | 8.0 kg (Approx.) |
| Overall Combined Weight | 15.0 to 20.0 kg (Total packaged array) |
| Country of Origin | India (Manufacturer: Electronics India) |
Core Features & User Benefits
- High-Sensitivity Silicon Photodiode Element Captures subtle atomic emission wavelengths with high fidelity, achieving an equipment accuracy threshold of ±2% for critical low-range clinical and soil assays.
- Narrow-Band Interference Glass Filters Mounted on an accessible rotating selector disc to block background light distortion, ensuring high isolation of specific Na, K, Ca, or Li spectral signatures.
- Integrated One-Touch Electronic Auto-Ignition Features an in-built high-voltage electronic strike system activated by a panel switch, eliminating external open-flame lighting risks for improved operator safety.
- Concentric Non-Corrosive Axial Nebulizer Molded from premium black bakelite to resist acidic, basic, or saline sample degradation while reliably maintaining an ultra-fine sample mist stream.
- Oil-Free Mini Compressor and Regulator Setup The independent compressor delivers a continuous flow of dry, oil-free compressed air, preventing oil-mist contamination from destabilizing analytical reads.
- Optimized Multi-Sector Analytical Flexibility Engineered to measure concentration inputs in ppm or meq scales, providing a versatile platform for agricultural soil assessment, food testing, and chemical quality control.
Frequently Asked Questions
What alkali metals can the Digital Flame Photometer Model 381 accurately measure?
The Digital Flame Photometer Model 381 by Electronics India provides high-precision determination of Sodium (Na) and Potassium (K) alkali metals within a standard range of 0–100 ppm. The system also supports modular, optional upgrades for analyzing Calcium (Ca) and Lithium (Li) concentrations based on custom testing requirements.
Why is the separate oil-free mini compressor unit critical for the operation of Model 381?
The independent mini compressor unit is critical because it supplies clean, dry, oil-free compressed air necessary to atomize liquid samples safely through the nebulizer. Its built-in pressure regulator prevents pressure fluctuations from destabilizing the flame profile, ensuring stable data output on the LED display panel.
What is the accuracy and repeatability profile of this Electronics India flame photometer?
The Digital Flame Photometer Model 381 delivers an accuracy margin of ±2% for sample concentration levels up to 40 ppm, and ±5% for elements exceeding 40 ppm. This performance is paired with an equipment repeatability index of ±2 counts, providing dependable consistency for daily testing runs.
How does the auto-ignition system function on the Model 381 Main Unit?
The Model 381 contains an advanced in-built electronic auto-ignition mechanism that ignites the LPG and compressed air stream at the press of a front-panel switch. This internal system eliminates manual lighting steps, improving safety and accelerating laboratory startup routines.
What kind of maintenance is required for the concentric black bakelite nebulizer?
The axial-flow concentric nebulizer is constructed from non-corrosive black bakelite to resist deterioration from chemical reagents. To maintain a fine mist spray and clear suction paths into the mixing chamber, users should flush the system with distilled water after processing salt-heavy samples.
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