Published: | Author: JW RESEARCH SUPPLY
Spectrophotometry is one of the most fundamental analytical techniques in any modern laboratory. From pharmaceutical QC and clinical diagnostics to environmental water testing and academic research, a reliable spectrophotometer is a non-negotiable instrument. At JW RESEARCH SUPPLY, we supply a curated range of UV-Vis and visible spectrophotometers engineered for the diverse needs of Singapore's laboratory sector — whether you are running routine absorbance readings at 280 nm for protein quantification or performing full-spectrum wavelength scans across 190–1100 nm.
Our spectrophotometer portfolio spans cost-effective visible-range single-beam units for teaching and routine use, through to research-grade double-beam UV-Vis instruments with variable spectral bandwidth. Every unit comes backed by our Singapore-based technical team for installation, calibration, and ongoing support.
We offer two primary categories to match your throughput and analytical requirements:
Ideal for routine colorimetric assays, turbidity measurements, and teaching laboratories. These compact units operate in the 320–1100 nm range with a tungsten lamp and deliver reliable results at an accessible price point. Popular with secondary schools, polytechnics, and field labs.
For quantitative analysis requiring baseline stability, photometric accuracy, and low stray light — double-beam is the gold standard. Our UV-Vis units cover 190–1100 nm with deuterium + tungsten halogen lamps, variable spectral bandwidth (0.5/1/2/4 nm), and high-speed scanning. Suitable for pharmaceutical QC, method validation, and materials science.
| Specification | VIS Single-Beam (JW-VIS-SB) | UV-Vis Double-Beam (JW-UV-DB) |
|---|---|---|
| Optical System | Single beam, grating 1200 lines/mm | Double beam, grating 1200 lines/mm |
| Wavelength Range | 320–1100 nm | 190–1100 nm |
| Spectral Bandwidth | 4 nm (fixed) | 0.5 / 1 / 2 / 4 nm (variable) |
| Wavelength Accuracy | ±2.0 nm | ±0.3 nm |
| Wavelength Repeatability | ≤1.0 nm | ≤0.1 nm |
| Photometric Range | -0.3 to 3.0 Abs / 0–200%T | -4.0 to 4.0 Abs / 0–400%T |
| Photometric Accuracy | ±0.5%T | ±0.3%T (0–100%T) |
| Stray Light | ≤0.3%T @ 340 nm, 400 nm | ≤0.03%T @ 220 nm (NaI), 340 nm (NaNO₂) |
| Baseline Flatness | N/A | ±0.001 Abs (200–1000 nm) |
| Baseline Stability | ≤0.004 Abs/h (after warm-up) | ≤0.0004 Abs/h (after 2h warm-up) |
| Scan Speed | Manual wavelength setting | Fast / Medium / Slow (up to 4000 nm/min) |
| Light Source | Tungsten halogen lamp | Deuterium + Tungsten halogen (auto changeover) |
| Detector | Silicon photodiode | Silicon photodiode (dual) |
| Sample Compartment | 4-position manual cell holder (10 mm) | 4-position manual or automatic 8-cell changer (optional) |
| Data Output | USB 2.0, parallel printer port | USB 2.0, RS-232, LAN (RJ45) |
| Software | Basic absorbance/%T readout (PC app) | Pro UV-Vis Analyst — spectrum scan, kinetics, quant, DNA/protein, 21 CFR Part 11 ready (optional) |
| Power | AC 100–240V, 50/60 Hz, 80W | AC 100–240V, 50/60 Hz, 200W |
| Dimensions (W×D×H) | 480 × 380 × 220 mm | 630 × 520 × 260 mm |
| Weight | ~12 kg | ~28 kg |
| Warranty | 12 months | 24 months (lamps 6 months) |
* Specifications are typical values at 25°C ambient. Contact us for the latest datasheet and custom configuration options. All models are CE / RoHS compliant. ISO calibration certificate available upon request.
Choosing between our VIS and UV-Vis models comes down to three main considerations:
A single-beam spectrophotometer measures light intensity through the sample only and compares it against a reference measurement taken separately — it is simpler and more affordable. A double-beam spectrophotometer splits the light into two paths (sample and reference) simultaneously, providing real-time baseline correction, improved stability, and higher accuracy for demanding quantitative analysis.
Our UV-Vis spectrophotometers cover 190–1100 nm, suitable for both ultraviolet and visible-range analysis. We also offer visible-only models (320–1100 nm) for routine applications such as colorimetry and turbidity measurement at a more economical price point.
Yes. JW RESEARCH SUPPLY provides local technical support across Singapore including installation, calibration, IQ/OQ documentation, and annual maintenance contracts. Our engineers are based in Singapore and can reach most lab sites within 24 hours.
Absolutely. We supply a full range of quartz, glass, and disposable plastic cuvettes — including micro-volume and flow-through types — as well as lamp replacements, calibration standards, matched cell pairs, and sipper systems. Bundled orders receive discounted pricing.
Contact our Singapore sales team for pricing, availability, and on-site demonstrations at your laboratory.
📞 +65 8039 3660 | ✉️ SINGAPORE@JWSHY.COM
JWRESEARCH / JW RESEARCH SUPPLY — Singapore's trusted laboratory equipment partner.