The Gammatec GD-1A and GD-2 are lightweight, easy to use, portable densitometers for measuring the transmission density of x-ray film. The operator simply zeroes the instrument on the viewer, places the film on the viewer, places the probe on the area of interest and reads the density on the 3 digit LCD screen. The units have been designed for use in on-site mobile darkrooms, laboratories and offices. The GD-1A has a cable and pencil type probe, whilst the GD-2 has a built-in probe.
| Parameter | GD-1A | GD-2 |
| Measuring Range | 0.00D – 4.20D | 0.00D – 4.20D |
| Probe | Temperature compensated (4mm Diameter) | Temperature compensated (4mm Diameter) |
| Display | 3 Digit LCD | 3 Digit LCD |
| Accuracy | ±0.03D | ±0.03D |
| Dimensions | 145mm x 80mm x 30mm | 140mm x 65mm x 38mm |
| Weight | 350g (including batteries) | 500g (including battery) |
| Casing | ABS plastic enclosure | Gun coated Aluminium enclosure |
| Battery Protection | Automatically switches off after a maximum of 2 minutes if no new reading is obtained. Extra external switch disconnects battery from unit during shipping / transportation | Automatically switches off after a maximum of 2 minutes if no new reading is obtained. Extra external switch disconnects battery from unit during shipping / transportation |
| Power Supply | 3.0V (2 x 1.5V AAA Dry cell batteries) | 9.0V (1 x 9V 6LR61 Dry cell) |
| FEATURES | OPTIONAL ACCESSORIES |
| Zero button for quick zero | Durable carry case |
| Backlit display | White light meters |
| “Hold” function for last reading | Calibrated film density strip |
| Automatic switch off | |
| Lightweight and portable | |
| Keypad programmable software |
**Errors and omissions excepted (E&OE)
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