8 eTape Liquid Level Sensor + extras

Rating:

100% of 100

SKU: ADA463 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...

$82.60 AUD, inc GST

$75.09 AUD, exc GST

Quantity Discounts:

6-12 $72.09 (exc GST)
12+ $69.84 (exc GST)

Out of Stock

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 8" 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: 10.1" (257 mm)
Width: 1.0" (25.4mm)
Thickness: 0.015" (0.208 mm)
Resistance Gradient: 140Ω / inch (56Ω / cm), ± 10%
Active Sensor Length: 8.4" (213 mm)
Substrate: Polyethylene Terephthalate (PET)
Sensor Output: 1500Ω empty, 300Ω 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

Start the conversation

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)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

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:

$12+ 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!