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Some things never change, like the high quality of the TVC Jarrell-Ash Quarter Meter Ebert Monochromator, found in thousands of laboratories worldwide. This high performance, small monochromator remains as popular as ever, and its overall efficiency remains unmatched by any other small monochromator.

The use of two gratings, each blazed at different wavelengths, maximizes the performance of the instrument throughout the entire visible spectrum. The gratings are mounted on one assembly and are interchanged by rotation of an external control knob. To work in regions other than the visible, or if only one grating is needed, order the 82-415 model and choose one or two gratings to cover any desired region from 200 nm to 40 µm. There is a large selection of gratings to choose from.

Two bayonet-type slits are provided which can be easily removed and interchanged for other slits. This feature allows resolution or high throughput measurements, depending on the width of the slit used. An adjustable slit is also available.

The MonoSpec 25 features an Ebert optical design with the entrance and exit slits in a straight line configuration. This optical system provides high throughput with an aperture of f/3.5. An all-aluminum casting makes this a highly stabilized optical system.

There are numerous applications for which the MonoSpec 25 is ideal. Use it as a monochromatic illuminator for microscopes, photometers and other spectrometer systems. The MonoSpec 25 performs superbly as a spectrometer measuring absorption, transmission, emission, reflection, fluorescence and phosphorescence. Its versatility has made the MonoSpec 25 the standard monochromator for general use in physics, chemistry, biology and engineering laboratories.

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Specifications
Focal Length:
250 mm
Aperture (f/number):
3.5
Resolution:
0.2 nm with 1200 g/mm grating
Reciprocal Linear Dispersion:
1.6 nm/mm with 1200 g/mm grating
Stray Light:
<0.2%

Popular Ruled Diffraction Gratings

Groves/mm
Blaze Wavelength
Useful Spectral Range
Reciprocal Linear Dispersion nm/mm
2360
240 nm
180 nm-450 nm
1.6
1180
300 nm
180 nm-550 nm
3.3
1180
500 nm
350 nm-1.0 µm
3.3
590
500 nm
300 nm-1.0 µm
6.6
590
1.0 µm
700 nm-1.8 µm
6.6
295
2.1 µm
1.8 µm-3.8 µm
13.2
147.5
4.0 µm
2.6 µm-6 µm
25.6
100
6.5 µm
4.5 µm-10.8 µm
37.8
50
10.0 µm
7.0 µm-21.0 µm
75.4
30
30.0 µm
21.0 µm-40.0 µm
128.0

MonoSpec 25 Systems & Accessories

82-410

MonoSpec 25 Ebert Monochromator 250 mm focal length, f/3.5, with 150 µ entrance and exit slits and two gratings, one 2360 g/mm, blazed at 300 nm and the other, 1180 g/mm, blazed at 500 nm. (Gratings have 64 mm X 64 mm ruled area.) Contains two digital wavelength indicators and manual sine drive.

82-415

MonoSpec 25 Ebert Monochromator 250 mm focal length, f/3.5, with 150 µ entrance and exit slits and one of the gratings listed below (except 985301017), one holder for two 67 x 67 x 6 mm gratings (11-043). Contains one digital wavelength indicator and manual sine drive.
Includes calibration for any grating ordered with the instrument.
Note: Other slits can be substituted for 150 µ at no charge. For substitution of 2360 g/mm grating, 985301017, add $150.00 to price of 82-415.

Accessories

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11-043

Dual Grating Holder for holding two 67.5 x 67.5 x 6.4 mm gratings. Interchangeable with one supplied with instrument.

82-420(x)

Kit to Adapt 82-415 with second readout counter and coupling assembly.

15003010

Stepping Motor Drive Kit to convert MonoSpec 25 to a computer controlled scanning monochromator. Includes motor, optical limit switches and all necessary hardware. LambdaSCAN controller sold separately

00-4149

MonoSpec 25 Operator's Manual

Gratings

64 mm x 64 mm ruled area on a 67.5 mm x 67.5 mm x 6.4 mm thick glass blank
985301017
Ruled grating, 2360 g/mm, 240 nm blaze
985302015

Ruled grating, 1180 g/mm, 180 nm blaze

985302017

Ruled grating, 1180 g/mm, 240 nm blaze

985302018

Ruled grating, 1180 g/mm, 300 nm blaze

985302020

Ruled grating, 1180 g/mm, 400 nm blaze

985302022

Ruled grating, 1180 g/mm, 500 nm blaze

985302024

Ruled grating, 1180 g/mm, 600 nm blaze

985302026

Ruled grating, 1180 g/mm, 700 nm blaze

985302028

Ruled grating, 1180 g/mm, 800 nm blaze

985303017

Ruled grating, 590 g/mm, 240 nm blaze

985303018

Ruled grating, 590 g/mm, 300 nm blaze

985303020

Ruled grating, 590 g/mm, 400 nm blaze

985303022

Ruled grating, 590 g/mm, 500 nm blaze

985303024

Ruled grating, 590 g/mm, 600 nm blaze

985303027

Ruled grating, 590 g/mm, 750 nm blaze

985303030

Ruled grating, 590 g/mm, 1.0 blaze

985303031

Ruled grating, 590 g/mm, 1.2 blaze

985303032

Ruled grating, 590 g/mm, 1.3 blaze

985303034

Ruled grating, 590 g/mm, 1.6 blaze

985304016

Ruled grating, 295 g/mm, 200 nm blaze

985304018

Ruled grating, 295 g/mm, 300 nm blaze

985304020

Ruled grating, 295 g/mm, 400 nm blaze

985304022

Ruled grating, 295 g/mm, 500 nm blaze

985304024

Ruled grating, 295 g/mm, 600 nm blaze

985304027

Ruled grating, 295 g/mm, 750 nm blaze

985304030

Ruled grating, 295 g/mm, 1.0 blaze

985304032

Ruled grating, 295 g/mm, 1.3 blaze

985304033

Ruled grating, 295 g/mm, 1.5 blaze

985304034

Ruled grating, 295 g/mm, 1.6 blaze

985304036

Ruled grating, 295 g/mm, 2.1 blaze

985304037

Ruled grating, 295 g/mm, 2.6 blaze

985304818

Ruled grating, 147.5 g/mm, 300 nm blaze

985304822

Ruled grating, 147.5 g/mm, 500 nm blaze

985304839

Ruled grating, 147.5 g/mm, 2.6 blaze

985304840

Ruled grating, 147.5 g/mm, 4.0 blaze

985305424

Ruled grating, 100 g/mm, 600 nm blaze

985305444

Ruled grating, 100 g/mm, 6.0 blaze

985305445

Ruled grating, 100 g/mm, 6.5 blaze

985306950

Ruled grating, 50 g/mm, 10.0 blaze

985307457

Ruled grating, 40 g/mm, 22.5 blaze

985307958

Ruled grating, 30 g/mm, 30.0 blaze

Many additional options and accessories are available for the MonoSpec 25 models. Please contact the factory or your representative for more information.

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