(800) 331-4728
(916) 383-5341
[grauhall AT cwnet DOT com]
8524 Erinbrook Way
Sacramento, CA 95826
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Optical Experiment Supplies
To order call us on our toll free number or email us at grauhall@grauhall.com with card info and products desired and a phone number where you can be reached, or send us a snail mail to Grau-Hall Scientific, 8524 Erinbrook Way, Sacramento, CA 95826.
| Item | Description | U/M | Price | Item# |
| Chart - Laminated - Solar Spectrum This hansome wall chart, covering the visible portion of the solar spectrum, shows the location of the more prominent Fraunhofer lines. These darklines, some narrow and some wide, are caused by the absorption of specific frequencies within the atmosphere of the earth or sun. Both colorful and informative, this chart makes an excellant teaching aid for any science classroom. | This durable chart (seen above) is printed on heavy paper stock and is fitted with metal binding strips at top and bottom. The upper strip includes tabes suitable for wall haning. Chart dimention is 71cm x 28cm. | each | 20.20 | 3178188 |
| Chart - Laminated - Spectrum Analysis This chart shows the visible continuous spectrum of the sun and the emission or bright line spectra of ten relatively common elements. It provides an excellant beginning point to show the student the total individuality of the spectrum of each element. It also presents an opportunity to discuss the general relationship between the number of lines and the number of atomic shell electrons. Also shown is an explanation of the "red shift" or Doppler Effect which is a change in the perceived frequency usually of an absorption or Fraunhofer line. This change or shift is caused when the light source is moving at high speed toward or away from the viewer. | Certain materials and solutions will selectively absorb on or more bands of light. These characteristic dark bands are very specific and readily identify the material or solution through which light is passing. Absorption bands for didymium glass, chlorophyll and oxyhemoglobin are shown. A number of line drawings show how spectra may be produced or clarify other aspects of the importance of spectral analysis. This durable chart is printed on heavy paper stock and is fitted with metal binding strips at top and bottom. The upper strip includes tabes suitable for wall haning. Chart dimention is 107cm x 71cm. (see below) | each | 26.65 | 3178187 |
| Colored filters - red, yellow, blue, orange, purple, green, clear | 4 “x4 “acetate | 7/set | 6.60 | 3000054 |
| 7 “x7 “acetate | 7/set | 12.40 | 3000055 | |
| Diffraction gratings | 35mm slide mounting | each | .75 | 3178138 |
| Flame salts A selection of six salts for student use in observing spectra of some fairly common elements. Included are salts of barium, boron, calcium, lithum, potassium and strontium. A test tube may be partially filled with water and the outside dipped into a solution of salt for introduction into the flame. | Also provided are a test tube and a holder with a length of nichrome wire for introducing the salts directly into the flame. Wabash #4700 (see below) | set/6 | 73.45 | 3178479 |
| Fluorescent liquids A set of permanent vials of liquids which fluoresce brilliantly under ultraviolet light. They illustrate the absorption of energy at one frequency [UV] and the re-radiation of that energy at a different but visible frequency. The light source may be any true ultraviolet lamp; ambient light should be minimized. Viewing is best when the ultraviolet light source is directed away from the viewer and straight at the front side of the vials. | The wood frame securely holds the five glass vials of liquid in place. Frame dimensions are 20x11x4cm. The salts and dyes included are quinine sulfate, primuline, rhodamine B, rhodamine 6G and fluorescein. Although the amount of dissolved chemical is minute, MSDS forms are included. Cannot be shipped during the winter months because of the risk of freezing. Wabash #345 (see below) | set/5 | 82.80 | 3178345 |
| Polarizing filters | 2-1/2”x1-1/2” | set/2 | 4.00 | 3000187 |
| Michelson Interferometer (to be used with a laser device such as a laser pointer) | Science source #18400 | kit | 88.00 | 3218400 |
| Replica grating PTG-1 | 600 lines/mm on 25x25mm ruled area | each | 50.40 | 3178001 |
| PTG-3A | 600 lines/mm on 12.5mm d. ruled area | each | 36.00 | 3178003 |
| PTG-5A | 600 lines/mm on 25mm d. ruled area | each | 50.40 | 3178005 |
| PTG-443 in molded frame | 600 lines/mm on 32x26mm ruled area | each | 64.80 | 3178443 |
| Spectroscope - Comparison SP-116 A student instrument for simultaneously showing the spectra of two gas discharge tubes against a common back-lighted scale that reads in nanometers. This unit may also be used to observe other light sources such as halide, fluorescent and sodium vapor lamps. It uses a fine grade replica transmission grating of 600 lines per mm to create a vertical image of the two spectra one above the other. The scale, which is about 75mm in actual length, is illuminated only when the push-button at the end of the chord is held closed. | A long-life 9 volt battery is included. Calibrations are from 380 to 760nm. Strong spring wire clips hold the spectrum tubes securely. The adjustable slit is controlled by the small knob onthe side. The cast aluminum housing is finished with light gray polyurethane paint. The weight is well-balanced on the stainless steel post and wide-span tripodbase. Overall height is 32 cm. Housing is 44 cm long by 30 cm wide. Weight is 9 Kg. | each | 734.40 | 3178116 |
| Spectroscope - Student SP-125 This is a replica diffraction grating instrument with an internal scale that shows students the wavelength in nanometers. It is used for the detection and identification of elements by their characteristic spectral emission lines. The light source may be from salts in aflame or from electronically excited tubes filled with elemental gases such as helium or hydrogen. It may also be used to observe the more prominent Fraunhofer lines in the solar spectrum as well as the spectra of solutions such as those that contain chlorophyll or blood. | The grating has 600 lines per mm. The scale reads from 380 nm to 720nm and has an actual length of approximately 35mm. The entire visible spectrum can be seen at once. The slit is adjustable and a reflectoris provided to back-light the scale. The housing is one-piece aluminum casting, finished with light gray polyurethane paint, mounted on a stainless steel post and supported on a cast iron tripod base. | each | 446.40 | 3178125 |
| Spectoscope - Hand-held SP-131 These are used in the laboratory and classroom when wavelength measurement is not neccesary. Spectra of the first and second order may easily be seen. The dispersion is by means of a diffraction grating of approximately 600 lines per mm. These instruments are useful for viewing the bright lines of metal salts in flames, of gases in discharge tubes and absorption spectra of solutions and certain colored glasses. Both fixed and adjustable slit units have a single collimating lens with fixed focus. | Fixed slit | each | 98.00 | 3178131 |
| Spectoscope - Hand-held SP-130 See above for description. | Adjustable slit | each | 131.80 | 3178130 |
| Spectoscope - Hand-held | Simple cardboard tube | each | 3.50 | 3864208 |
| 24/set | 41.60 | 3864208 |
| Item | Description | U/M | Price | Item# |
| Optical bench | with meter stick | set | 18.50 | 3920006 |
| Optical bench | without meter stick | set | 16.00 | 3000297 |
| Marker and object | for optical bench | each | 5.55 | 3000253 |
| Candle holder | for optical bench - one candle | each | 7.80 | 3000241 |
| Lens holder (38mm) | for optical bench | each | 4.45 | 3000235 |
| Lens holder (75mm) | for optical bench | each | 6.65 | 3000258 |
| Light source | for optical bench | each | 41.00 | 3000244 |
| Board screen | for optical bench | 5/pack | 4.45 | 3000246 |
| Screen support | for optical bench | each | 5.55 | 3000256 |
| Lens - glass - double concave | 38mm d. 10cm f.l. | each | 4.00 | 5406201 |
| 38mm d. 15cm f.l. | each | 4.00 | 5406202 | |
| 38mm d. 20cm f.l. | each | 4.00 | 5406203 | |
| 75mm d. 20cm f.l. | each | 9.00 | 5406204 | |
| Lens - glass - double convex | 38mm d. 5cm f.l. | each | 4.00 | 5406205 |
| 38mm d. 10cm f.l. | each | 4.00 | 5406206 | |
| 38mm d. 15cm f.l. | each | 4.00 | 5406207 | |
| 38mm d. 20cm f.l. | each | 4.00 | 5406208 | |
| 38mm d. 30cm f.l. | each | 4.00 | 5406209 | |
| 75mm d. 17cm f.l. | each | 7.00 | 5406210 | |
| Equilateral prism - glass | 25mm x 50mm long | each | 8.70 | 5406146 |
| 25mm x 75mm long | each | 9.60 | 5406150 | |
| 25mm x 100mm long | each | 13.50 | 5406147 | |
| 75mm x 9mm long (or thickness) | each | 13.50 | 5406155 | |
| 25mm x 150mm long | each | 20.10 | 5406152 | |
| Right angle prism - glass | 32mm x 50mm long | each | 13.10 | 5406148 |
| 100mm x 10mm long (or thickness) | each | 18.85 | 5406158 | |
| optical quality, usually about 3/4" to 1" long and 1/2" to 5/8" wide on hypoteneus (variable supply) | each | 14.00 | 5406159 |
