0

empowering creative people

5 eTape Liquid Level Sensor + extras

SKU: ADA3827

$85.56 AUD, inc GST
$77.78 AUD, exc GST

More Views

5 eTape Liquid Level Sensor + extras
85.56 AUD

SKU: ADA3827

$85.56 AUD, inc GST
$77.78 AUD, exc GST

Shipping:

  • $6.95 Standard (2-4 days, tracked)
  • $8.95 Express (Overnight*, tracked)
  • $3 Economy Post* (3-7 days, no tracking)
  • FREE Pickup (Newcastle only)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

The 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. 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. We haven't seen anything else that is affordable and accurate for measuring liquid level. This sensor seems like it would be a handy addition to a hydroponics, aquarium, fountain, or pool controller, or perhaps measuring a rain tube. This particular sensor is the 5" version, and it includes a 4-pin connector and 560Ω 5% 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 ADC pin. Check the tutorials tab for a quick-start pointer!

Please Note: This product only comes with the 5" bare Tape Liquid Level Sensor.  In Adafruit's demo, Adafruit set up a 12" enclosed version with an Adafruit Metro, a TB6612 Stepper Motor Driver Breakout Board, and an Automotive Gauge Stepper Motor to demonstrate functionality.

Technical Details

  • Sensor Length: 4.8" / 124mm
  • Width: 1.1" (28.2mm)
  • Thickness: 0.015" / 0.381mm)
  • Resistance Gradient: 150Ω/inch (60 ohms/cm)
  • Substrate: Polyethylene Terephthalate (PET)
  • Actuation Depth: Nominal 1" (25.4mm)
  • Resolution: < 0.01" (0.25 mm)
  • Temperature Range: 15°F - 150°F (-9°C - 65°C)

For more information, check out: eTape Liquid Level Sensor 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); }

Product Dimensions: 165.0mm x 25.0mm x 0.8mm / 6.5" x 1.0" x 0.0"

Product Weight: 31.7g / 1.1oz

Documentation and Resources:

Product Comments

Exact shipping can be calculated on the view cart page (no login required).

We deliver Australia-wide with these options:

  • $3 for Small Items (3-7 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.95 for Express Post (Overnight for Australia Post Next Day Network, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

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.

Our physical address (here's a PDF which includes other key business details):

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

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!