POP Series
(single-beam)
POP is a single-beam spectrophotometer that measures transmittance or absorbance in the UV-Vis range to determine concentration and purity. It offers high accuracy and reproducibility for use in environmental, biotech, and chemical research.
Overview – POP
POP Series (Single-Beam UV-Vis Spectrophotometer)
POP Series is a compact, single-beam UV-Vis spectrophotometer designed for routine analysis, education, and general laboratory applications.
By simplifying optical design while maintaining measurement reliability, POP delivers stable performance, fast operation, and excellent cost efficiency in a small footprint.
The POP Series is available in two models—POP and POP-V—allowing users to select the most suitable configuration based on wavelength range and application requirements.
Designed for Everyday Laboratory Use
POP focuses on what laboratories need most:
ease of use, measurement stability, and operational speed.
Its intuitive interface enables accurate data acquisition with minimal user training, making it ideal for high-frequency routine measurements as well as educational environments.
Key Benefits
Simple and reliable single-beam optics
Optimized optical configuration reduces system complexity while ensuring stable measurements.
Fast measurement speed
High-speed wavelength scanning enables quick spectrum acquisition and efficient workflows.
Cost-effective solution
Designed to deliver essential UV-Vis performance at an accessible price point.
Expandable configuration
Compatible with a wide range of cells and accessories to support diverse applications.
Responsive technical support
Supported by K LAB’s structured service and application experience.
Model Lineup
POP
Full-range UV-Vis spectrophotometer (190–1100 nm) designed for applications requiring UV measurements, high photometric accuracy, and stable long-term performance across a wide range of analytical tasks.
POP-V
Visible-only spectrophotometer (340–1100 nm) for laboratories that do not require UV measurements, providing reliable absorbance and colorimetric analysis with a more cost-efficient system configuration.
POP Vis+
Compact visible-range spectrophotometer (320–1100 nm) focused on essential absorbance and transmittance measurements, ideal for routine testing, education, and applications where simplicity and affordability are prioritized.
|
POP |
POP-V |
POP Vis+ |
|
|
Light Source |
Tungsten-Halogen + Deuterium |
Tungsten-Halogen |
Tungsten-Halogen |
|
Measurement Range |
UV-Vis |
Visible |
Visible |
|
Wavelength Range |
190–1100 nm |
340–1100 nm |
320–1100 nm |
|
Spectral Bandwidth |
< 1.8 nm |
< 1.8 nm |
< 5 nm |
|
Wavelength Accuracy |
< ±0.5 nm |
< ±0.5 nm |
< ±1.5 nm |
|
Photometric Range |
Abs −3 to +3 |
Abs −3 to +3 |
Abs ±3 |
|
Stray Light |
< 0.05% @220 nm (NaI) |
< 0.05% @340 nm (NaNO₂) |
< 0.1% @340 nm (NaNO₂) |
|
Cell Holder |
Multi-cell (8 cells) |
Multi-cell (8 cells) |
Single-cell / multiple cuvette types |
|
Display |
7-inch (1280 × 800) |
7-inch (1280 × 800) |
7-inch (1280 × 800) |
|
Weight |
10.5 kg |
10.5 kg |
4.4 kg |
|
Price Position (vs. POP) |
100% |
~85–90% |
≤ 60% (40%+ lower) |
Typical Applications
Performance & Technology
Principle of UV-Vis Spectroscopy
UV-Vis spectroscopy analyzes molecular properties by observing electronic transitions induced by ultraviolet and visible light. Absorption occurs when the energy required for an electronic transition matches the energy of incident light, which is determined by its wavelength, as described by the Planck equation (E = hν = hc/λ).
By measuring absorbance or transmittance across a broad wavelength range, UV-Vis spectroscopy provides insight into molecular structure, interactions, and chemical environments. Its versatility and accessibility make it a widely adopted analytical technique in chemistry, biotechnology, and routine laboratory analysis.
Optical System Design
The POP series utilizes a precisely engineered optical system to ensure reliable and reproducible measurements across the UV and visible regions.
Equipped with a Czerny–Turner monochromator, the system combines diffraction gratings and mirrors to accurately select wavelengths while minimizing stray light. A carefully optimized single-beam optical layout reduces mechanical complexity and enhances long-term stability, while advanced control algorithms ensure consistent optical alignment during operation.
Light Source & Detection
POP covers a wide wavelength range using optimized light sources tailored to each spectral region. A deuterium lamp provides stable ultraviolet output, while a tungsten halogen lamp ensures high intensity and stability in the visible range. Automatic lamp switching guarantees seamless spectral coverage without user intervention.
Transmitted light is detected using a high-sensitivity silicon photodiode, enabling accurate measurement of absorbance and transmittance even at low signal levels.
Core Measurement Performance
POP is designed to deliver uncompromising analytical performance, verified through rigorous internal validation.
Wavelength accuracy is automatically verified at every startup using the characteristic Balmer lines of the deuterium lamp. Additional validation using certified reference materials ensures consistent performance across the full wavelength range.
Quantitative Performance & Linearity
To maintain high photometric reliability, POP automatically updates blank measurements during analysis using a multi-cell holder, minimizing signal drift over time.
These characteristics enable stable long-term measurements and reproducible quantitative results, even in routine or high-throughput workflows.
Photometric Accuracy & Baseline Stability
POP demonstrates excellent linearity across an absorbance range of 0 to 3 Abs, supporting reliable quantitative analysis based on Beer–Lambert’s law.
Using the Quantitation mode, users can generate calibration curves from standard samples and accurately determine unknown concentrations. High correlation coefficients (R² up to 0.9999) confirm the system’s suitability for precise concentration analysis in research and quality control environments.
Measurement Modes & Analytical Capability
POP integrates multiple analytical modes into a single, intuitive platform:
Photometric Mode
Measures absorbance or transmittance at selected wavelengths
Spectrum Mode
Acquires full spectra across user-defined wavelength ranges
Quantitation Mode
Performs concentration analysis using calibration curves
Kinetics Mode
Monitors time-dependent absorbance changes
User-defined Methods
Enables customized workflows for specific applications
These modes allow POP to adapt seamlessly to diverse analytical requirements, from routine measurements to advanced kinetic studies.
Built-In Test (BIT) & Instrument Reliability
POP features a Built-In Test (BIT) system that automatically performs self-diagnostics at startup. The system checks lamp status, motor operation, wavelength accuracy, and optical components to ensure optimal operating conditions before measurement.
By continuously monitoring critical components, POP helps prevent unexpected downtime and maintains consistent analytical performance.
Software, Control & Data Integrity
POP operates as a fully stand-alone instrument and also supports PC-based remote control. An onboard ARM Cortex-A55 processor combined with an Android operating system ensures stable, responsive, and independent operation without the need for an external PC.
Two optional PC software packages are available to extend system functionality and compliance:
View is a PC-based control and analysis software that enables remote operation of POP, data acquisition, advanced analysis, report generation, and data export in common formats such as CSV, Excel, and PDF.
View and Secure are available as optional software and are sold separately.
Secure is a dedicated compliance software designed to support 21 CFR Part 11 requirements. It provides user authentication, audit trails, and electronic signature management for traceability and regulatory inspections.
View and Secure are available as optional software and are sold separately.
Specifications
Key Differences
Wavelength Range
Light Source(s)
Wavelength Repeatability
Photometric Accuracy
Baseline Stability
Baseline Flatness
Stray Light
Lamp Interchange Wavelength
Common Specifications
Photometrics System
Single-beam type
Detector
Silicon Photodiode
Wavelength Display (setting)
0.1 nm
Wavelength Accuracy
<± 0.5 nm
Slew Rate
7,800 nm/min
Scanning Speed
4,000 nm/min
Photometric Range
Absorbance : -3 A to 3 A
Transmittance : 0% to 300%
Photometric Repeatability
± 0.003 Abs
RMS noise
< 0.0002 Abs rms (at 700 nm)
Monochromator
Czerny-Turner Monochromator
Standard Cell Holder
Multi-Cell Holder(8 cells)
Operating System (OS)
Android
Display
7-inch (Resolution: 1280 x 800)
Control Options
Stand-alone PC
Dimensions
433(W) * 381(D) * 180(H) mm
Power Requirement
AC 100-240V, 50/60Hz, 140VA
Weight
10.5kg
PC Software
View for Windows(optional)
Support
Downloads
Applications
Troubleshooting
-
How to separate Top cover for New POP series
How to separate Top cover for New POP series How to separate Top cover for New POP series#TS-PR1151-001 Introduction Procedure
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