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12 CHEMICAL ETAPE LIQUID LEVEL SENSOR WITH TEFLON JACKET, ADAFRUIT 1786

  Id številka: 723
Znamka:ADAFRUIT
Zaloga:   DA
Cena:64,95 €
liquid, flow ADAFRUIT 12 Chemical eTape Liquid Level Sensor with Teflon Jacket, adafruit 1786
liquid, flow ADAFRUIT 12 Chemical eTape Liquid Level Sensor with Teflon Jacket, adafruit 1786
 

DESCRIPTION

 

The Chemical eTape Liquid Level Sensor is a solid-state sensor with a resistive output that varies with the level of the fluid. It does away with clunky mechanical floats, and easily interfaces with electronic control systems. What separates this from adafruits  other eTape Liquid Sensor is the Teflon (FEP) jacket that is rated for use in chemical, petroleum, and food safe applications

 

The eTape sensor's envelope is compressed by the hydrostatic pressure of the fluid in which it is immersed. This results in a change in resistance that corresponds to the distance from the top of the sensor to the surface of the fluid. The sensor's resistive output is inversely proportional to the height of the liquid: the lower the liquid level, the higher the output resistance; the higher the liquid level, the lower the output resistance.

 

This is a very unique sensor, adafruit haven't seen anything else that is affordable and accurate for measuring liquid level. This particular sensor is the 12" model, adafruit also include a 4-pin connector and 560 ohm resistor. The connector is so you don't have to solder directly to the delicate pins: instead, just solder to the connector and plug it onto the sensor.

 

Since the sensor is resistive, it is easy to read it using a microcontroller/Arduino ADC pin. Check the tutorials tab for a quick-start pointer.

 

 

TECHNICAL DETAILS

 

Dimensions:

- 305mm x 25mm / 12" x 1"

- Weight: 5g

- Sensor Length: 361mm / 14.2"

- Thickness: 0.38mm / 0.02"

 

Tech Specs:

- Sensor Output: 400-2000Ω ±20%

- Ref. Resistance: 2000Ω ±20%

- Actuation Depth: Nominal 25.4mm / 1"

- Resistance Gradient: 60Ω/cm / 150Ω /inch

- Power Rating: 0.5 Watts

- Temperature Range: 15°F - 150°F / -9°C - 65°C

 

Chemical eTape Datasheet

 

Adafruit don't have a detailed tutorial for this sensor but it acts very much like a thermistor so we suggest checking out that tutorial for background, and then following these instructions:

 

Connect pin #2 of the sensor to ground, then pin #3 to a 560 ohm resistor. The other side of the 560 ohm resistor to VCC (3.3V or 5V for example) to create a resistor divider. The ADC pin connects to the point between the resistor and sensor.