Revision as of 06:02, 26 August 2016

Requirements

1mm accuracy optimal, 3 mm is absolute max
Open source version of http://www.cnccontrols.com/thcontrol.asp - 20-250 mm range for pointing to metal, with no obstructions

Maxbotics - [1]. 2' has under 1% error.
Sparkfun has them - [2]. Online chat at https://www.sparkfun.com/technical_assistance
Banner Engineering - $121 - [3]
Xenix - [4]

Maxbotics - 1 mm resolution options, not water protected - 12" minimum distance - $40 - [9]. Adafruit has it.
Microptik - 3 mm resolution - http://www.micropik.com/PDF/HCSR04.pdf - 2-400 cm range - services@elecfreaks.com. Sample Arduino sketch - [10]
HC-SR04 - appears to get 3 mm accuracy - [11]. Sparkfun has the sensor + code - [12]

Video shows 15 cm measurement, with oscillation +- 1mm - and text says well within 2% accuracy. 2% of 15 cm is 3 mm - so this would do for measurements of torch height for 1/2" steel easily (12 mm thickness).

@@ Line 4: / Line 4: @@
 =Tech Support=
+*Maxbotics - [http://www.maxbotix.com/contact.htm]. 2' has under 1% error.
 *Sparkfun has them - [https://www.sparkfun.com/categories/84]. Online chat at https://www.sparkfun.com/technical_assistance
 *Banner Engineering - $121 - [http://www.plccenter.com/Shop/BANNER%20ENGINEERING/S18UBAQ/USPP?source=GoogleShopping&IgnoreRedirect=true&gclid=CO2y_4is3s4CFQuNaQod8TsBEw&kwid=productads-adid^113089519769-device^c-plaid^93272993125-sku^15000003399-adType^PLA]
+*Xenix - [https://senix.com/ultrasonic-sensor-toughsonic-3/]
 =YouTube=