LDM42A is an optoelectronic distance measuring device for industrial applications with an analogue interface 4...20 mA. It works contact-free on the principle of comparative phase measurement (amplitude modulation) and facilitates precisely accurate measurement of distances. It distinguishes itself through high precision as well as high independence from the surface of the measuring object. The red, visible laser beam allows for easy alignment. The sister model LDM42A has been further developed for fast distance measurements on white surfaces.
| Measuring range |
0.2 m ... 30 m on almost all natural surfaces, over 100 m achievable depending on the degree of reflection of surfaces |
| Measuring uncertainty |
±2 mm under defined measuring conditions
±3 mm (+15 °C ... +30 °C)
±5 mm (-10 °C ... +50 °C) |
| Resolution |
0.1 mm, freely scalable |
| Reproducibility |
0.5 mm |
| Measuring time |
0.24 s ... 6 s adjustable or automatically in mode DT
0.1 s in mode DW on white surface
20 ms in mode DX on white surface (only LDM42A) |
| Laser divergence |
0.6 mrad |
| Laser class |
Laser class 2 acc. to DIN EN 60825-1:2001-11 (650 nm, red) |
| Operating temperature |
-10 °C ... +50 °C |
| Storage temperature |
-40 °C ... +70 °C |
| Supply voltage |
10 V ... 30 V direct currents |
| Power consumption |
Ca. 1.5 W |
| Serial interface |
RS232 or optional RS422, max. Baud rate 38400, ASCII, setting of measuring functions, scaling, measuring time via commands, display of measured values, internal temperature and error code |
| Switching output |
Programmable switching threshold and hysteresis, "high side" switch, maximum load 0.5 A |
| Analog output |
Programmable distance range limits,
4 mA to 20 mA, adjustable reaction on error (3 mA, 21 mA or last valid measured value) |
| Housing material |
Aluminum anodized |
| Size |
187 mm x 96 mm x 50 mm |
| Weight |
850 g |
| Protection class |
IP 65 |
| Shock resistance |
10 g / 6 ms (DIN ISO 9022-3-31-01-1) |
| MTBF |
30,000 hours at 25 °C |
| Mounting |
4 drill holes for M6 screws, 100 mm x 85 mm |
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