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Gravity: Analog Signal Isolator

SKU: DFR0504

$31.96 AUD, inc GST
$29.05 AUD, exc GST

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Gravity: Analog Signal Isolator
31.96 AUD

SKU: DFR0504

$31.96 AUD, inc GST
$29.05 AUD, exc GST


  • $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 Analog Signal Isolator can isolate analog signal and provide isolated power to sensors. It can effectively prevent sensor signal interference and apply to multi-parameter water quality monitoring sensors. Because usually sensors will be interfered by the other sensors during the measurement, especially those sensors in water quality monitoring system. For example, pH sensor (pH meter) will be affected by the electrical conductivity sensor (EC meter).
The common solution is to isolate the power supply. Once you put them into the same container and share the same power supply, their value won’t be interfered by each other.This analog signal isolator is designed for this situation, it will isolate the analog signal and provide isolated power to the sensors. It has an on-board 5V isolated power IC, and compatible with Gravity-3Pin interface, plug and play, no need for soldering. The transform rate is 1:1, which means analog values in two sides should remain the same.

Gravity: Analog Signal Isolator Interface - DFRobot
Gravity: Analog Signal Isolator Interface
The isolator is compatible with almost all analog output sensors of many types produced by DFRobot.
1.MCU should provide 5.0±0.1V power supply and it decides the finial output precision.
2.The module will consume a large current when it is working, you’d better to use an external power supply.
3.The MAX output current of SEN terminal is 170mA.
4.The GNDs of SEN and MCU are isolated, please DO NOT connect them together.
5.It will be a little warm when it is working.


  • Operating Voltage: 5.0V
  • Response Time: 4 seconds (Typ)
  • Analog Error (both ends): <± 20mV (Typ)
  • Interface Type: PH2.0-3P
  • No load Current: 75mA
  • Dimension: 42 * 32mm / 1.65 * 1.26 inch
  • Non-isolated Terminal (Arduino Side)
    Supply Voltage: 5.0 ± 0.1V
    Analog Output: 0 ~ 5.0V
  • Isolated Terminal (Sensor Side)
    Output Voltage: 5.0 ± 0.2V
    Analog Input: 0 ~ 5.0V
  • Documents


    Parts List

  • Gravity: Analog Signal Isolator x1
  • PH2.0-3P Cable x2
  • 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
    NSW, 2289

    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.