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12 Standard eTape Liquid Level Sensor with Plastic Casing

SKU: ADA2656

$127.95 AUD, inc GST
$116.32 AUD, exc GST
12 Standard eTape Liquid Level Sensor with Plastic Casing
127.95 AUD

SKU: ADA2656

$127.95 AUD, inc GST
$116.32 AUD, exc GST
In stock, with a short lead time. 40 units dispatch in 4 to 7 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Tue, 29th of Aug with Express Post within Australia.

This 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 Adafruit's other eTape Liquid Sensor is the hard plastic jacket that makes it less susceptible to damage.

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. It comes with a 3-pin JST connector.

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.

Note: This product only comes with the plastic enclosed eTape Liquid Level Sensor.  In Adafruit's demo, Adafruit set it up with an Adafruit Metro, a TB6612 Stepper Motor Driver Breakout Board, and an Automotive Gauge Stepper Motor.

Technical Details

Dimensions:

  • 305mm x 29mm x 13mm / 12" x 1.14" x 0.51"
  • Weight: 56g
  • 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
  • Standard eTape Datasheet

Adafruit don't have a detailed tutorial for this sensor but it acts very much like a thermistor so they 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.

 // the value of the 'other' resistor #define SERIESRESISTOR 560 // What pin to connect the sensor to #define SENSORPIN A0 void setup(void) { Serial.begin(9600); } void loop(void) { float reading; reading = analogRead(SENSORPIN); Serial.print("Analog reading "); Serial.println(reading); // convert the value to resistance reading = (1023 / reading) - 1; reading = SERIESRESISTOR / reading; Serial.print("Sensor resistance "); Serial.println(reading); delay(1000); }  

Then look in the App Note for the conversion between resistance and liquid level.

Documentation and Resources:

Product Comments

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

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Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

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