Ultraviolet Visible Spectrophotometer
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Showing 331–360 of 460 results
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | UV-2602 |
| Price | Upon Request |
| Brand | Shimadzu |
|---|---|
| Origin | Japan |
| Model | UV-3600 |
| Optical Design | Double-Beam (Pseudo-Double-Beam) |
| Instrument Type | Ultraviolet-Visible Spectrophotometer |
| Compliance | Designed to meet ISO/IEC 17025-relevant optical performance criteria for routine laboratory quantification and spectral characterization |
| Brand | Shimadzu |
|---|---|
| Origin | Japan |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Import Status | Imported |
| Model | UV-3600i Plus |
| Instrument Architecture | Double-beam |
| Automation Level | Automatic Wavelength Scanning |
| Wavelength Range | 185 nm to 3300 nm |
| Brand | Shimadzu |
|---|---|
| Origin | Japan |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | UV-3600Plus |
| Instrument Architecture | Double-Beam |
| Detector Type | Photomultiplier Tube (PMT), InGaAs Photodiode, Cooled PbS Photoconductor |
| Wavelength Range | 185–3300 nm |
| Automation Level | Automatic Wavelength Scanning |
| Spectral Bandwidth | UV-Vis: 0.1, 0.2, 0.5, 1, 2, 3, 5, 8 nm (8 steps) |
| NIR | 0.2, 0.5, 1, 2, 3, 5, 8, 12, 32 nm (9 steps) |
| Wavelength Accuracy | ±0.08 nm (UV-Vis), ±0.32 nm (NIR) |
| Stray Light | <0.00008% at 220 nm (NaI) |
| Brand | Solar Light |
|---|---|
| Origin | USA |
| Model | SPF-290AS |
| Wavelength Range | 290–400 nm |
| Scan Resolution Options | 1 nm, 2 nm, or 5 nm |
| Compliance | ISO 23698:2024, ISO 23675:2024, ISO 24443, FDA Guidance, COLIPA, Boots Star Rating Methodology |
| Sample Types | Lotions, creams, sprays, gels, powders, emulsions, textiles |
| Data Output | Monochromatic Protection Factor (MPF), SPF, UV transmittance spectra |
| Software Features | Pre-loaded erythemal action spectrum & solar irradiance reference data (CIE 1987 / ISO 17166), user-modifiable weighting functions, audit-trail-enabled calculation logs |
| Brand | SOPOTOP |
|---|---|
| Origin | Shanghai, China |
| Model Series | 721, 722, 7230G, 723PC |
| Optical System | Dual-beam |
| Detector Type | Photodiode Array |
| Wavelength Range | 325–1100 nm (model-dependent) |
| Spectral Bandwidth | 2–5 nm |
| Wavelength Accuracy | ±1.0 nm (7230G & 723PC), ±2.0 nm (721 & 722) |
| Wavelength Repeatability | 0.5–1.0 nm |
| Stray Light | ≤0.2%T at 360 nm (723PC) to ≤0.5%T at 360 nm (721) |
| Photometric Accuracy | ±0.5%T (722/7230G/723PC), ±1.0%T (721) |
| Photometric Repeatability | ±0.2%T (722/7230G/723PC), ±0.5%T (721) |
| Baseline Linearity | ±0.004A (723PC only) |
| Stability | ±0.003A/h (7230G & 723PC), ±0.5%T/5min (721 & 722) |
| Display | 128×64 LCD |
| Dimensions | 456 × 375 × 220 mm |
| Brand | SOPOTOP |
|---|---|
| Origin | Shanghai, China |
| Model | 723PC |
| Optical System | Single-beam |
| Detector | Silicon Photocell |
| Wavelength Range | 325–1100 nm |
| Wavelength Accuracy | ±1.0 nm |
| Wavelength Repeatability | ±0.5 nm |
| Spectral Bandwidth | 2 nm |
| Display | 4.3-inch color TFT touchscreen (480 × 272 pixels) |
| Data Interface | USB 2.0 |
| Software | UV-Solution PC workstation (optional) |
| Power Supply | 220 V ±10%, 50 Hz / 110 V ±10%, 60 Hz, 75 W |
| Net Weight | 10.0 kg |
| Dimensions (W × D × H) | 470 × 380 × 225 mm |
| Brand | SOPOTOP |
|---|---|
| Origin | Shanghai, China |
| Model | 752 |
| Optical System | Single-beam |
| Detector Type | Silicon Photocell |
| Wavelength Range | 200–1000 nm (0.1 nm step resolution) |
| Spectral Bandwidth | 4 nm |
| Wavelength Accuracy | ±1.0 nm |
| Wavelength Repeatability | ±0.5 nm |
| Photometric Accuracy | ±0.5% T (at 0–100% T) |
| Photometric Repeatability | ±0.3% T |
| Stray Light | ≤0.3% T at 220 nm and 360 nm |
| Display | 4.3-inch color TFT touchscreen (480 × 272 pixels) |
| Data Interface | USB 2.0 |
| Power Supply | 220 V ±10%, 50 Hz / 110 V ±10%, 60 Hz, 90 W |
| Dimensions (W × D × H) | 470 × 380 × 225 mm |
| Net Weight | 10.5 kg |
| Compliance | CE, ISO/IEC 17025 compatible operation environment |
| Brand | SOPOTOP |
|---|---|
| Origin | Shanghai, China |
| Model | 754 |
| Optical System | Single-beam |
| Detector Type | Photocell |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Spectral Bandwidth | 4 nm |
| Wavelength Scanning Step | 0.1 nm |
| Display | 4.3-inch color touchscreen (480×272) |
| Data Interface | USB |
| Software | UV-Solution workstation (optional) |
| Power Supply | 220 V ±10%, 50 Hz / 110 V ±10%, 60 Hz, 90 W |
| Net Weight | 10.5 kg |
| Dimensions (W×D×H) | 470×380×225 mm |
| Brand | SOPTOP |
|---|---|
| Origin | Shanghai, China |
| Model | 752 |
| Optical System | Single-beam |
| Detector | Photomultiplier Tube (PMT) |
| Wavelength Range | 200–1000 nm |
| Spectral Bandwidth | 4 nm |
| Wavelength Accuracy | ±2.0 nm |
| Wavelength Repeatability | 1 nm |
| Stray Light | ≤0.5% T (at 220 nm and 360 nm) |
| Transmittance Accuracy | ±0.5% T |
| Transmittance Repeatability | ±0.2% T |
| Baseline Drift | ±0.003 A/h |
| Display | 128×64 LCD |
| Dimensions | 455 × 430 × 220 mm |
| Data Interface | USB |
| Wavelength Setting | Manual (keyboard-input with 6 preset wavelengths) |
| Brand | SOPTOP |
|---|---|
| Origin | Shanghai, China |
| Model | UV2800PC |
| Optical System | Dual-beam |
| Detector | Photomultiplier Tube (PMT) |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.3 nm |
| Spectral Bandwidth | 1.8 nm |
| Stray Light | ≤0.05%T at 220 nm and 360 nm |
| Display | 320×240 LCD (6-inch) |
| Software | UV-Solution 3.0 |
| Compliance | ASTM E275, ISO 6223, USP <857>, GLP-ready audit trail support |
| Brand | Shanghai Spectrum |
|---|---|
| Origin | Shanghai, China |
| Model | SP-1920 |
| Optical Design | Dual-beam, spatially separated, asymmetric vertical optical path |
| Detector Type | Digital dual high-performance photodiodes |
| Wavelength Range | 190–1100 nm |
| Spectral Bandwidth | 1.8 nm (typical) |
| Wavelength Accuracy | ±0.5 nm |
| Stray Light | ≤0.05% T at 220 nm (NaI) and 340 nm (NaNO₂) |
| Display | 8-inch color capacitive touchscreen |
| Light Sources | 6V/10W halogen lamp (2000 h lifetime), deuterium lamp (1000 h lifetime) |
| Sample Compartment | Fixed 100 mm pathlength cuvette holder |
| Power Supply | 110/220 VAC, 50/60 Hz, ±10% |
| Dimensions (W×D×H) | 655 × 420 × 265 mm |
| Compliance | Meets ISO 9001 manufacturing standards |
| Brand | SPECREATION |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic |
| Model | CP-EFlat |
| Price Range | USD 70,000 – 125,000 |
| Optical Design | Grazing-Incidence Concave Varied-Line-Spacing (VLS) Flat-Field Spectrograph |
| Detector Type | CCD (Charge-Coupled Device) |
| Wavelength Range | 1–200 nm |
| Wavelength Accuracy | ±0.3 nm |
| Wavelength Repeatability | ±0.05 nm |
| Spectral Bandwidth | 0.1–5.0 nm (adjustable) |
| Stray Light | ≤0.01% T |
| Slit Width | 0.05–0.5 mm (motorized, continuous adjustment) |
| Flat-Field Imaging Area | 25 mm |
| Vacuum Performance | ≤1×10⁻⁴ Pa (UHV option available: ≤1×10⁻⁸ Pa) |
| Grating Options | 120, 300, 1200, 2400 g/mm (dual-grating vacuum-compatible turret mount) |
| Resolution (FWHM) | 0.01–0.3 nm (grating-dependent) |
| Zero-Order Blocker | Standard |
| Filter Holder | Standard |
| Laser Alignment Aid | Integrated visible (635 nm) alignment diode |
| Software Control | LabVIEW-based platform with wavelength calibration traceability to NIST-traceable emission lines |
| Brand | Thermo Fisher Scientific |
|---|---|
| Origin | USA |
| Manufacturer | Yes |
| Import Status | Imported |
| Model | SPECTRONIC 200 |
| Instrument Architecture | Single-beam |
| Detector Type | Photodiode Array |
| Wavelength Range | 340 nm – 1000 nm |
| Wavelength Scanning | Motorized Auto-wavelength Selection |
| Spectral Bandwidth | < 4 nm |
| Wavelength Accuracy | ±1.0 nm (typical, per ASTM E275) |
| Stray Light | < 0.1% T at 340 nm (as measured per ISO 9050) |
| Brand | SUNNY HENGPING INSTRUMENT |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Domestic |
| Model | 721 |
| Price Range | USD 0–720 |
| Optical Design | Single-Beam |
| Detector Type | Photocell (Silicon Photodiode) |
| Wavelength Range | 330–1000 nm |
| Wavelength Accuracy | ±2 nm |
| Wavelength Repeatability | ≤1.0 nm |
| Spectral Bandwidth | 5 nm |
| Stray Light | ≤0.5% T (at 360 nm) |
| Transmittance Accuracy | ±0.5% T |
| Transmittance Repeatability | ≤0.2% T |
| Absorbance Range | 0–1.999 Abs |
| Transmittance Range | 0–199.9% T |
| Concentration Readout | Yes (with user-defined factor) |
| Display | Backlit LCD |
| Auto Zero & Auto 100% T | Yes |
| Power Supply | 220 V ±10%, 50 Hz |
| Dimensions | 470 × 350 × 200 mm |
| Weight | 8 kg |
| Brand | SUNNY HENGPING INSTRUMENT |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Domestic |
| Model | 722 |
| Price Range | USD 0–750 |
| Optical Design | Single-Beam |
| Detector | Silicon Photocell |
| Wavelength Range | 325–1000 nm |
| Wavelength Scanning | Motorized Auto-Positioning |
| Spectral Bandwidth | 4 nm |
| Wavelength Accuracy | ±2 nm |
| Wavelength Repeatability | ≤1.0 nm (330–1000 nm) |
| Stray Light | ≤0.5% T at 360 nm |
| Display | Backlit LCD |
| Zero Adjustment | Automatic T=0% Calibration |
| Concentration Mode | Direct C-mode with User-Defined Factor Input |
| Power Supply | 220 V ±10%, 50 Hz |
| Dimensions | 470 × 350 × 200 mm |
| Weight | 8 kg |
| Brand | Sunny Hengping Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | 7230G / 723PC |
| Optical Design | Single-Beam |
| Detector Type | Photocell |
| Wavelength Range | 325–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Wavelength Repeatability | ±0.2 nm |
| Spectral Bandwidth | 4 nm (7230G) / 2 nm (723PC) |
| Display | 4.3-inch Color Touchscreen (480 × 272 resolution) |
| Data Interface | USB |
| Power Supply | 220 V ±10%, 50 Hz / 110 V ±10%, 60 Hz, 75 W |
| Net Weight | 10.0 kg |
| Dimensions (W × D × H) | 470 × 380 × 225 mm |
| Brand | Sunny Hengping Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | 752 / 754 / 756PC |
| Optical Design | Single-beam |
| Detector Type | Photocell |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Spectral Bandwidth | 2 nm (756PC), 4 nm (752/754) |
| Wavelength Resolution | 0.1 nm |
| Display | 4.3-inch color TFT touchscreen (480 × 272 pixels) |
| Data Interface | USB 2.0 |
| Power Supply | 220 V ±10%, 50 Hz or 110 V ±10%, 60 Hz |
| Net Weight | 10.5 kg |
| Dimensions (W×D×H) | 470 × 380 × 225 mm |
| Brand | SUNNY HENGPING INSTRUMENT |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | UV2000 |
| Optical Design | Single-Beam |
| Detector Type | Silicon Photodiode |
| Wavelength Range | 200–1000 nm (0.1 nm step), extendable to 190–1100 nm |
| Wavelength Accuracy | Automatic Calibration |
| Spectral Bandwidth | 2 nm |
| Display | 4.3-inch color TFT touchscreen (480 × 272) |
| Data Interface | USB |
| Power Supply | 220 V ±10%, 50 Hz / 110 V ±10%, 60 Hz, 90 W |
| Dimensions (W×D×H) | 470 × 380 × 225 mm |
| Net Weight | 10.5 kg |
| Brand | Sunny Hengping Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | UV2200 |
| Optical Design | Dual-beam |
| Detector | Photodiode Array |
| Wavelength Range | 190–1100 nm (0.1 nm step resolution) |
| Spectral Bandwidth | 4 nm |
| Wavelength Accuracy | ±0.3 nm |
| Wavelength Repeatability | ±0.1 nm |
| Photometric Accuracy | ±0.002 Abs (0–0.5 Abs), ±0.004 Abs (0.5–1.0 Abs) |
| Photometric Repeatability | ±0.001 Abs |
| Stray Light | ≤0.05% T at 220 nm and 360 nm |
| Baseline Flatness | ±0.001 Abs (200–1000 nm) |
| Interface | USB 2.0 |
| Display | 4.3-inch color TFT touchscreen (480 × 272 pixels) |
| Power Supply | 220 V ±10%, 50 Hz / 110 V ±10%, 60 Hz, 90 W |
| Dimensions (W×D×H) | 470 × 380 × 225 mm |
| Net Weight | 10.5 kg |
| Brand | Sunny Hengping Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | UV2400 |
| Price Range | USD 1,400 – 2,800 (FOB Shanghai) |
| Optical Design | Proportional-monitoring double-beam |
| Detector Type | Silicon photodiode |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Spectral Bandwidth | 1.8 nm |
| Wavelength Scanning Step | 0.1 nm |
| Display | 128 × 64 dot-matrix LCD |
| Sample Holder | Automated 8-cell rotating cuvette holder (10 mm pathlength) |
| Data Interface | USB 2.0 |
| Power Supply | 220 V ±10%, 50 Hz or 110 V ±10%, 60 Hz |
| Dimensions (L×W×H) | 545 × 450 × 235 mm |
| Net Weight | 17.0 kg |
| Gross Weight | 26.0 kg |
| Brand | Sunny Hengping Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Regional Classification | Domestic (China) |
| Model | UV2600 |
| Price Range | USD 2,800–4,200 (FOB Shanghai) |
| Optical Design | Proportional-monitoring double-beam |
| Detector Type | Silicon photodiode |
| Wavelength Range | 190–1100 nm |
| Wavelength Automation | Motorized wavelength drive with automatic calibration |
| Spectral Bandwidth | 1.8 nm |
| Wavelength Accuracy | ±0.3 nm |
| Wavelength Repeatability | ≤0.2 nm |
| Stray Light | ≤0.05% T (at 220 nm and 360 nm) |
| Photometric Accuracy | ±0.3% T |
| Photometric Repeatability | ≤0.1% T |
| Baseline Flatness | ±0.002 A |
| Baseline Drift | ≤0.001 A/h (at 500 nm) |
| Display | 6-inch 320×240 LCD |
| Brand | Sunny Hengping Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Regional Classification | Domestic (PRC) |
| Model | UV2800 / UV2800S |
| Optical System | Dual-beam |
| Detector Type | Silicon Photocell |
| Wavelength Range | 190–1100 nm |
| Spectral Bandwidth | 1.8 nm (UV2800) |
| Wavelength Accuracy | ±0.3 nm |
| Wavelength Repeatability | ±0.1 nm |
| Photometric Accuracy | ±0.002 A (0–0.5 A), ±0.004 A (0.5–1 A), ±0.3 %T (0–100 %T) |
| Photometric Repeatability | ±0.001 A (0–0.5 A), ±0.002 A (0.5–1 A), ±0.15 %T (0–100 %T) |
| Stray Light | ≤0.03 %T at 220 nm & 360 nm |
| Baseline Flatness | ±0.001 A (200–1000 nm) |
| Scan Speed | 10–3000 nm/min (adjustable) |
| Display | 320 × 240 pixel LCD (6-inch) |
| Interface | USB 2.0 |
| Power Supply | 220 V ±10 %, 50 Hz or 110 V ±10 %, 60 Hz |
| Dimensions (W × D × H) | 545 × 450 × 235 mm |
| Net Weight | 17.0 kg |
| Gross Weight | 26.0 kg |
| Brand | Sunny Hengping Instrument |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Regional Classification | Domestic (China-Made) |
| Model | UV2900 |
| Price Range | USD 7,000–10,000 (FOB Shanghai) |
| Optical Design | Dual-Beam |
| Detector | Photomultiplier Tube (PMT) |
| Wavelength Range | 190–900 nm (extendable to 185 nm) |
| Wavelength Drive | Motorized Auto-Scanning |
| Spectral Bandwidth | 0.1–5.0 nm continuously variable |
| Default Discrete Bandwidth Settings | 0.1, 0.2, 0.5, 1.0, 2.0, 3.0, 4.0, 5.0 nm |
| Data Output | Digital via USB 2.0 |
| Power Supply | 220 V ±10%, 50 Hz, 200 W |
| Net Weight | 30.0 kg |
| Dimensions (L×W×H) | 620 × 510 × 245 mm |
| Packaging Dimensions (L×W×H) | 745 × 635 × 400 mm |
| Brand | SUNNY HENGPING INSTRUMENT |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Manufacturer |
| Model | V2200 Visible Spectrophotometer |
| Optical Design | Single-beam |
| Detector Type | Silicon photodiode |
| Wavelength Range | 325–1100 nm (0.1 nm step increment) |
| Spectral Bandwidth | 2 nm |
| Wavelength Accuracy | Auto-wavelength positioning |
| Display | 4.3-inch color TFT touchscreen (480 × 272 pixels) |
| Data Interface | USB |
| Light Source | Imported 20 W / 12 V halogen lamp |
| Power Supply | 220 V ±10%, 50 Hz / 110 V ±10%, 60 Hz |
| Net Weight | 10.0 kg |
| Dimensions (W × D × H) | 470 × 380 × 225 mm |
| Brand | Techcomp |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Structure | Single-Beam |
| Detector Type | Photocell |
| Wavelength Range | 190–1100 nm |
| Wavelength Accuracy | ±0.5 nm |
| Wavelength Repeatability | ≤0.2 nm |
| Spectral Bandwidth | 2 nm |
| Stray Light | ≤0.05% T |
| Automation Level | Automatic Wavelength Scanning |
| Display | 5-inch TFT Color Touchscreen |
| Optical Platform | Integrated Die-Cast Optical Base |
| Compliance | Designed for GLP-compliant routine analysis |
| Connectivity | USB and RS-232 interfaces for PC control and printer output |
| Brand | Techcomp |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Domestic |
| Model | UV1200 |
| Instrument Architecture | Pseudo-Double-Beam |
| Detector Type | Photodiode Array (PDA) |
| Wavelength Range | 190–1100 nm |
| Automation Level | Automatic Wavelength Scanning |
| Spectral Bandwidth | 2 nm |
| Wavelength Accuracy | ±0.5 nm |
| Wavelength Repeatability | ≤0.3 nm |
| Stray Light | ≤0.05% |
| Display | 7-inch HD capacitive touchscreen |
| Brand | Techcomp |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Domestic |
| Model | UV2500 |
| Price Range | USD 9,800–13,900 (FOB Shanghai) |
| Optical Design | Dual-Beam |
| Detector | Photodiode Array (PDA) |
| Wavelength Range | 190–1100 nm |
| Wavelength Scanning Mode | Motorized Auto-Scan |
| Spectral Bandwidth | 1.5 nm |
| Wavelength Accuracy | ±0.3 nm |
| Wavelength Repeatability | ±0.1 nm |
| Stray Light | ≤0.05% T at 220 nm and 340 nm |
| Brand | Techcomp |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | UV2600 |
| Price Range | USD 9,800–13,900 (FOB Shanghai) |
| Optical Design | Dual-beam |
| Detector | Photomultiplier Tube (PMT) |
| Wavelength Range | 190–900 nm |
| Wavelength Scanning | Motorized, Software-Controlled |
| Spectral Bandwidth | 0.2, 0.5, 1, 2, 5 nm (Auto-Selectable) |
| Wavelength Accuracy | ±0.3 nm |
| Wavelength Repeatability | ±0.1 nm |
| Stray Light | <0.010% T (at 220 nm, NaI |
| Brand | Thermo Fisher |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Origin | Imported |
| Model | Biomate 160 |
| Instrument Architecture | Double-Beam |
| Detector Type | Photodiode Array (PDA) |
| Wavelength Range | 190–1100 nm |
| Wavelength Selection | Manual |
| Spectral Bandwidth | 2 nm |
| Wavelength Accuracy | ±0.5 nm |
| Stray Light | <1.0%T at 198 nm (KCl), <0.05%T at 220 nm (NaI), <0.03%T at 340 nm (NaNO₂) |