UNICO S-1205E Spectrophotometer – 5nm Bandpass, 220V Review

Let’s Dive into UNICO S-1205E Spectrophotometer – 5nm Bandpass, 220V

The UNICO S-1205E Spectrophotometer – 5nm Bandpass, 220V is a digital, fully programmable visible spectrophotometer that promises to bring accuracy and efficiency to any lab setting. Manufactured by UNICO, this instrument is designed to expand on the capabilities of visible spectroscopy, offering a blend of versatility and user-friendliness. With its push-button digital keypad for wavelength changes and a wide sample compartment, it stands out as a potential workhorse for water testing, environmental analysis, and petroleum industry applications.

My need for a reliable spectrophotometer arose from my work in environmental consulting, where accurate water quality analysis is crucial. I was specifically looking for an instrument that could handle a wide range of samples and offer repeatable results.

Upon unboxing, I was struck by the solid feel of the unit; the build quality appears robust, suggesting it can withstand the rigors of daily lab use. The digital display is clear and easy to read, and the keypad offers a tactile response that inspires confidence.

Compared to the Thermo Scientific GENESYS 150 and the Hach DR6000, the UNICO S-1205E appealed to me due to its balance of affordability and feature set. The GENESYS 150 is a more advanced (and expensive) instrument, while the DR6000 is geared more towards pre-programmed methods.

My initial impression was one of cautious optimism; I was excited to see how it performed in real-world testing, but also aware that specs don’t always translate into tangible results.

Check Best Price HERE

Real-World Testing: Putting UNICO S-1205E Spectrophotometer – 5nm Bandpass, 220V to the Test

First Use Experience

I initially tested the UNICO S-1205E in our environmental lab, focusing on analyzing water samples for common pollutants like nitrates and phosphates. The instrument performed admirably, providing consistent readings across multiple trials.

The UNICO S-1205E maintained its accuracy even with slight temperature fluctuations in the lab. Setting up the instrument was intuitive, although referencing the manual was necessary to fully grasp the self-calibration process.

After the first use, I was impressed with its ease of use and relative accuracy. However, the limited screen real estate meant I couldn’t view all the data simultaneously, which required frequent menu navigation.

Extended Use & Reliability

After three months of regular use, the UNICO S-1205E continues to deliver consistent results. There are no signs of significant wear and tear on the instrument.

Cleaning is straightforward, requiring only a soft cloth to wipe down the exterior. The UNICO S-1205E outperforms our older, analog spectrophotometer in terms of accuracy and repeatability, but the Thermo Scientific unit offers more advanced features.

Breaking Down the Features of UNICO S-1205E Spectrophotometer – 5nm Bandpass, 220V

Specifications

• Wavelength Range: 325-1000 nm Visible Wavelength – This range covers a broad spectrum of visible light, suitable for many common analytical tests.
• Slit Width: 5 nm – This affects the resolution of the instrument; a narrower slit typically provides better resolution but less light throughput.
• Optical System: Single Beam, Grating System 1200 Lines/nm – A single beam system is simpler and more affordable, while the grating system ensures accurate wavelength selection.
• Wavelength Accuracy: +- 2nm – This is the degree to which the instrument’s wavelength reading matches the true wavelength.
• Wavelength Repeatability: +- 1nm – This indicates how consistently the instrument can return to the same wavelength setting.
• Wavelength Resolution (display): 1nm – This represents the smallest increment the instrument can display in terms of wavelength.
• Photometric Accuracy: +-0.004 A at 0.5 A – This defines the accuracy of the absorbance readings.
• Photometric Range: 0% T to 125% T; -0.3 to 2.5 A; -9999 to 9999 – This describes the range of transmittance and absorbance values the instrument can measure.
• Photometric Repeatability: +-0.003A at 0.5 A – This refers to the consistency of absorbance readings.
• Stray Light: less than or equal to 0.3% T at 340 nm – Stray light can affect the accuracy of measurements, especially at higher absorbance values.
• Stability: +-0.002 A/hour at 500nm after 1-hour warmup – This demonstrates the instrument’s ability to maintain a stable baseline over time.
• Baseline flatness: +-0.010 A with PC software – This indicates the flatness of the baseline spectrum when using the optional PC software.
• Display: Abs and %T – The instrument displays absorbance and transmittance values.
• Quantitative mode: Standard curve 1st through zero, 1st, Factor – This allows for quantitative analysis using standard curves.
• Memory capability: up to 200 standard curves – This is convenient for storing frequently used calibration curves.
• Utility: Dark current, D2 on/off, system self calibration – These utilities assist with instrument diagnostics and calibration.
• Power requirements: 100-240 VAC, 100W – This wide voltage range makes it versatile for use in different regions.
• Size: 20″W x 17″D x 8″H – This provides an idea of the instrument’s footprint on the lab bench.

These specifications directly impact the instrument’s accuracy, reliability, and versatility in various analytical applications. A wider photometric range allows for measuring a broader concentration range of analytes, while good wavelength accuracy ensures that measurements are taken at the correct wavelengths for optimal results.

Performance & Functionality

The UNICO S-1205E performs its core function of spectral analysis reliably and accurately. The quantitative mode, coupled with the ability to store multiple standard curves, makes it easy to perform routine analyses.

The UNICO S-1205E has limitations in terms of advanced data processing; the need for optional Windows software to convert it into a scanning spectrophotometer is a notable weakness. However, the instrument generally meets expectations for a visible spectrophotometer in its price range.

Design & Ergonomics

The build quality is robust, the materials are durable, and the weight is manageable. The design is functional, with an easy-to-read display and responsive keypad.

The user interface is somewhat dated and requires some familiarization; the small display necessitates frequent menu navigation. The included manual is comprehensive and well-written, which helps to overcome the initial learning curve.

Durability & Maintenance

The construction suggests the UNICO S-1205E should last for many years with proper care. The instrument is easy to clean, requiring only regular wiping of the exterior surfaces.

Replacing the bulb or other components appears relatively straightforward based on the service manual. Preventative maintenance, such as regular calibration, is crucial to ensure long-term accuracy.

Accessories and Customization Options

The UNICO S-1205E Spectrophotometer comes with a standard cuvette holder for single or 4-cell measurements. The optional Windows software package converts the S-1205 into a scanning spectrophotometer.

The unit accepts cuvettes up to 50 mm path-length with the use of a separately sold longpath cell holder. This is a valuable customization option for applications that require longer path lengths to enhance sensitivity.

Pros and Cons of UNICO S-1205E Spectrophotometer – 5nm Bandpass, 220V