Add to Wish List

12 eTape Liquid Level Sensor + extras

SKU: ADA464 Brand: Adafruit
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...
$82.30 AUD, inc GST
$74.82 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Fri, 12th of Aug

Quantity Discounts:

  • 6-12 $71.83 (exc GST)
  • 12+ $69.58 (exc GST)
- +

3 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

Favourite product

Shipping:

  • $6+ Standard (5+ days*, tracked)
  • $10+ Express (2+ days*, tracked)
  • 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, Adafruit 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 an hydroponics, aquarium, fountain or pool controller, or perhaps measuring a rain tube. This particular sensor is the 12" model, They 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

  • Sensor Length: 14.1" (358 mm)
  • Width: 1.0" (25.4mm)
  • Thickness: 0.015" (0.208 mm)
  • Resistance Gradient: 150& / inch (59& / cm), ± 10%
  • Active Sensor Length: 12.6" (320.7 mm)
  • Substrate: Polyethylene Terephthalate (PET)
  • Sensor Output: 2250& empty, 400& full, ± 10%
  • Actuation Depth: Nominal 1 inch (25.4 mm)
  • Resolution: 0.01 inch (0.25 mm)
  • Temperature Range: 15°F - 140°F (-9°C - 60°C)

For more information, check out: eTape Liquid Level Sensor Datasheet eTape Liquid Level Sensor App note

Downloads:

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.

This product is listed in:

Sensors>Liquid & Flow

Product Comments

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

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

  • $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
  • $6+ for Standard Post (typically 6+ business days, tracked)
  • $10+ for Express Post (typically 2+ business days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

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

  • $11+ for Pack and Track (3+ days, tracked)
  • $16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase 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!

Write Your Own Review

Videos

View All

Guides

Micro:bit Soil Moisture Sensor

The Micro:bit is great for small portable projects like a soil moisture sensor. In this tutorial, we...
The Micro:bit is great for small portable projects like a soil moisture sensor. In this tutorial, we...

The Maker Revolution

The Maker Revolution celebrates the creation of new devices and the modification of existing ones - ...
The Maker Revolution celebrates the creation of new devices and the modification of existing ones - ...

Getting Hands-on with Sensors

What good is a robot if it can’t interact with the environment around it? Sensors are the back...
What good is a robot if it can’t interact with the environment around it? Sensors are the back...

Projects

Water Tank Level Sensor

Imagine getting home from work, its winter, its cold. You have a shower to warm up and half way thro...
Imagine getting home from work, its winter, its cold. You have a shower to warm up and half way thro...
Feedback

Please continue if you would like to leave feedback for any of these topics:

  • Website features/issues
  • Content errors/improvements
  • Missing products/categories
  • Product assignments to categories
  • Search results relevance

For all other inquiries (orders status, stock levels, etc), please contact our support team for quick assistance.

Note: click continue and a draft email will be opened to edit. If you don't have an email client on your device, then send a message via the chat icon on the bottom left of our website.