Products for USB Sensing and Control
Products for USB Sensing and Control

i-Snail-S Current Status Switch

ID: 3504_0

The i-Snail-S closes an electrical switch when currents greater than 0.15A are detected in the wire that passes through its window.


The i-Snail-S switch provides an accurate and cost effective method of monitoring the on/off status of electric loads including fans, pumps, motors, heaters and virtually any AC powered device.

The i-Snail-S serves as an ultra sensitive Go/No-Go load sensor. The dry contact relay (N.O.) closes when a minimum amount (150mA) of AC current is flowing through its monitored line. The device is ideal for monitoring the running state of fans, motors, pumps, heaters or any device that is AC powered, including large and small loads.

The output is a bi-directional solid state relay with a low turn on resistance of less than 4 ohms. The output may be interfaced to PLCs, DDC panels or other relays. The advanced hysteresis and transient detection circuitry prevent chattering and false switching due to line spikes and transients.

The i-Snail-S features a rugged enclosure with integrated barrier strip terminal block for easy wiring in the field.

Note: The i-Snail Current Status Switch measures the current in a single AC wire (either the positive or the negative). If you put the whole cable through the window the + and - wires will cancel each other out and the sensor will read a null current value.

Comes packaged with

  • Mounting Hardware for flexible surface mounting

Product Specifications

Sensor Properties
Controlled By Digital Input (5V)
Sensor Type Current (AC Switch)
Sensor Output Switch Type Normally Open (Bi-directional)
Input Current Min 150 mA
Input Current Max 100 A
Switch Hysteresis Max 10 mA
Electrical Properties
Switching Voltage Max (DC) 40 V DC
Switching Voltage Max (AC) 40 V AC
Switching Current Max 200 mA
Physical Properties
Material UL94V-0 ABS Plastic
Wire Window Size 13.7 mm
Operating Temperature Min -40 °C
Operating Temperature Max 50 °C
Customs Information
Canadian HS Export Code 9030.33.00
American HTS Import Code 9030.33.38.00
Country of Origin CA (Canada)

This switch connects to any device with a Digital Input.