drforsythe
Lifetime Supporting Member
I agree with the use of a laser product. I use ultrasonic sensors with good luck, but only on flat surfaces larger than the cone of the sensor (level in liquid tanks). Ultrasonics can be sensitive to reflection, and change in material.
I have used Balluff lasers in the past with good luck. Their website has a good search and filter feature. www.balluff.com. The BOD001W sensor has a range of 200 to 10,000 mm. It has 4-20mA output as well as two NPN/PNP selectable outputs. They have 0-10V available on a different model. This is just one option from one manufacturer.
I have used Balluff lasers in the past with good luck. Their website has a good search and filter feature. www.balluff.com. The BOD001W sensor has a range of 200 to 10,000 mm. It has 4-20mA output as well as two NPN/PNP selectable outputs. They have 0-10V available on a different model. This is just one option from one manufacturer.