  DM-SERIES
Digital Radiometers
Maximum calibration accuracy. All Spectroline radiometers
are calibrated for the highest accuracy by pyroelectric methods that are directly
traceable to NIST standards. A calibration certificate is supplied with every unit. The
sensor heads are provided with special diffusers that ensure accurate cosine response.
Since these sensors are configured with a low-offset transimpedance amplifier, their
linearity is vastly superior to that of competitive units. This results in an unmatched
overall accuracy of better than ±5% on all meters.
FEATURES
 | Unmatched overall accuracy of better than ±5% - directly traceable to
NIST standards
|
| Precisely calibrated with pyroelectric radiometer for maximum accuracy
|
| No sensitivity to infrared or other undesirable radiation due to use og
high-quality interference filters in sensor construction
|
| Autozeroing feature
|
| Versatile - Ten models available to measure five different wavelength
regions of ultraviolet and blue light
|
| Excellent linearity and cosine response
|
| Reliable, solid-state circuitry
|
| Compact, durable and simple to operate
|
| Built-in battery-level indicator
|
SPECIFICATIONS
Readout Unit
| Irradiance
Range |
| DMX-Series |
0 - 19,990 µW/cm2 |
| DMH-Series |
0 - 199.9 mW/cm2
(0 - 199,900 µW/cm2) |
| Resolution |
| DMX-Series |
10 µW/cm2 |
| DMH-Series |
0.1 mW/cm2
(100 µW/cm2) |
| Display |
| DMX-Series |
4 1/2 digit, 7
segment, LED, 0.5 inch (12.7mm) high |
| DMH-Series |
3 1/2 digit, 7
segment, LED, 0.5 inch (12.7mm) high |
Conversion Rate
3 readings per second nominal
Overall Accuracy
Better than ±5% with reference to NIST standards temperature coefficient ±0.025%/°C(0°
to 50°C)
Sensors
| Spectral
Ranges |
| DM-254X and DM-254H |
230 - 280 nanometers
(nm) |
| DM-300X
and DM-300H |
280 -
320 nanometers (nm) |
| DM-365X and DM-365H |
320 - 400 nanometers
(nm) |
| DM-400X and DM-400H |
420 - 480 nanometers
(nm) |
Temperature
Coefficient
±0.020%/°C(0° to 50°C)
Power Requirements
Four nonrechargeable "AA" size alkaline battery cells are included as standard.
Four rechargeable "AA" size NiCad battery cells and a battery recharger are
available as an option.
Dimensions
Readout Unit
Length: 7-1/4 in. (18.4cm)
Width: 3-1/2 in. (8.9cm)
Thickness: 2 in. (5.1cm)
Weight: 1 lb. (0.45kg)
Sensor
Length: 3 in. (7.6cm)
Width: 2 in. (5.1cm)
Thickness: 1/2 in. (1.3cm)
Weight: 1-1/4 oz. (35.4kg)
Sensor Cord Length
3ft. (91.4cm)
DM-SERIES ORDERING INFORMATION |
| CAT. NO. |
DESCRIPTION |
| VDM-254X |
Short Wave Digital
Radiometer |
| VDM-300X |
Medium Wave Digital
Radiometer |
| VDM-365X |
Long Wave Digital
Radiometer |
| VDM-450X |
Blue Light Digital
Radiometer |
|