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XHST2551 Optical Spectroscope

Description:
The type XHST2551 spectroscope is one of
physical experimental instrument in a middle school. It may be used
to illustrate construction of the spectroscope, observe continuous
spectrum, bright line and absorption spectra, and measure the
wavelength of spectral line and Planck constant, etc.
Specifications:
1. Working wavelength: 400-800nm
2. Objective focal length of collimator: 150mm
3. Objective focal length of telescope: 150mm
Eyepiece focal length of telescope: 25mm (low power)
12.5mm (high power)
4. Objective focal length of drum calibrated in wavelength: 100mm
5. Minimum graduation of wavelength scale: 2nm per graduation for
400-500nm
5nm per graduation for 500-600nm
10nm per graduation for 600-700nm
20nm per graduation for 700-900nm
6. Prism: refracted edge angle of 60°
7. Error in measuring wavelength: not greater than 2nm for 400-500nm
not greater than 5nm for 500-600nm
not greater than 10nm for 600-700nm
not greater than 20nm for 700-800nm
8. Resolving power: resolving mercury doublet 577nm and 579nm in
using eyepiece at low magnifying power, resolving sodium doublet
589nm and 589.6nm in using eyepiece at high magnifying power.
9. Dispersion: at focal plane of the telescope, the distance between
two spectral lines 656.3nm and w34nm of hydrogen atom is not less
than 9mm, average line dispersive power is not greater than
24.7nm/mm.
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XHST1018-PS Professional loupe
Professional Loupe for gemstones identifying. To see the internal or
surface characteristics of gemstone.
XHST1018-PS:
10X loupe chromatism
18mm lens |
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Diamond Tester Scale DMT-300 |
Diamond Tester Scale DMT-500 |
Model:
DMT-300
(Economic)
Product introduction:
1. Real Diamonds are indicated by RED
LIGHT and SOUND.
2. Card size and compact
3. High accuracy, User-friendly
4. Can work with stones of any settings, shapes,
5. Can work with stones of any sizes in any temperature.
6. Dimensions (L x W x H): 85mmx54mmx 14mm
7. Power Supply:2 x AAA battery
8. Weight .75g .
9. 150pcs/carton Carton Size (L x W x H): 65cmx30cmx 15cm |
Model:
DMT-500
(Economic)
Product introduction:
- Simple one step testing that will
distinguish between diamonds, simulate, and moissanite
- 3 audible sounds to give a warning buzzer Easy to use visual and
audio indicators Fast warm up and recovery time Operates on one 9
voltage battery (not included) Auto shuts off automatically after
three minutes to save the battery Completely portable Weight: 80g
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Diamond Tester Scale DMT-400
Model:
DMT-400
(Economic)
Product introduction:
1.Secification: Diamond Tester.
2.Working Voltage: DC 9v,6F 22 battery or AC adaptor(AC110-240 V, DC
9V,optional accessories)
3.Probe warming up time: about 25 seconds.
4.Working time: About 5 hours for continuous use
5.Ambient temperature:18C to 30C
6.Size:150mmX31.5mmX21mm(LxWxD)
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GEM Calper DC-3 |
Features:
Made of Lightweight
Non-Marring Carbon Fiber Material. Free of hurting when
measuring.
It is suited for measuring jewelry, magnetic objects and
charged objects.
1.ON/OFF Switch
2.mm/inch Switch
3.Zero setting
4.Runs on by one 1.5V cell battery |
Item No. |
Specification |
Throat depth |
TT-510-150 |
0-12.7mm*0.01 |
19mm |
TT-510-151 |
0-12.7mm*0.1 |
19mm |
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For other Gem gauges,
please check here:
Gem Thickness Gauge |