Sensors and Probes

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We offer a variety of liquid sensors that are designed to detect petroleum, water and other conductive liquids.  Many of our sensors are listed or certified under CSA, ULC and/or UL as intrinsically-safe or explosion-proof for use in hazardous locations.  Since our sensors (except the ATI-5029) consume zero current, virtually any length of sensing cable can be created.  Our petroleum-sensing cables offer the unique capability of being reusable even after being exposed to petroleum-based products.
To make it easier to select compatible A.T.Monitors equipment, we've compiled a detailed Product Comparison & Selection Chart.
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ATI-5005B  Water Sensor

image of 5005 b water sensor

The ATI-5005B Water Sensor is designed to detect water at a point location in tanks, sumps, piping and any other location to detect the presence of water or conductive liquids.

Downloads

ATI-5005B data sheet
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ATI-5005TS  Thread-mount Stainless-steel Water Sensor

image of 5005 t s water sensor

The new ATI-5005TS Water Sensor is a heavy-duty, stainless-steel version of our ATI-5005B sensor.  It has been designed for more extreme environmental conditions, able to withstand corrosion, higher temperature and pressure. When ordered with Teflon cable, it is safe for use in areas with high sanitary requirements such as clean rooms, food, dairy and medical.

NOTE:  The information provided is only preliminary.  Specifications will be updated once this sensor has been tested to determine its limits.

Downloads

ATI-5005TS data sheet
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ATI-5005N  Narrow-space Water Sensor

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The first of its kind, the ATI-5005N narrow-space water sensor (ATI-5005N12 shown above) was specifically designed to monitor the water level in deep underground well pipes, but can also be used for other similar applications.  Manufactured with stainless-steel, it is highly resistant to corrosion, and is narrow enough to fit in pipes as small as 1/2 inch (13 mm) inside diameter.

This sensor can be manufactured in standard lengths up to 36 inches (91.5 cm) with up to 3 detection levels.

Downloads

ATI-5005N data sheet
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ATI-5007B  Dual Liquid Sensing Cable

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The ATI-5007B is a flexible cable sensor that is primarily used for detecting water and petroleum leaks in the interstitial space of double-walled underground storage tanks.  The petroleum-sensing portion of the cable can detect petroleum products along the full length of the cable.  The water-sensing wires can be adjusted to detect water at any specific point along the cable.  Unlike many other petroleum-sensing cables, our cable can be reused even after it has been exposed to petroleum-based products.

Downloads

ATI-5007B data sheet
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ATI-5008  Vacuum Sensor

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The ATI-5008 is a vacuum type sensor specifically designed to quickly detect a loss of vacuum in the interstitial space of double-walled petroleum storage tanks.

Downloads

ATI-5008 data sheet
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ATI-5010 Series  Liquid Level Sensors

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The ATI-5010 is a float switch type sensor designed to detect rising or lowering levels of liquid inside storage tanks, pits or sumps.  A change in fluid level moves the float which activates or deactivates an alarm/indicator.  This sensor is available in many sizes and can either be configured to be mounted on a bracket or on a tank.  Multi-level configurations are also available.

Download the User Configuration Sheet to select the correct sensor for your application.

Downloads

ATI-5010 data sheet
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User configuration sheet
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ATI-5010W  Interstitial Leak Sensor

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The ATI-5010W Interstitial Leak Sensor is a non-discriminating liquid leak sensor which will detect the rising or lowering of liquids at a single location.  This sensor is suited for various applications such as: Interstitial space of steel tanks, sumps, dispensers, wells, containers, vats, manholes, trenches, etc.

Downloads

ATI-5010W data sheet
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ATI-5010S  Sump Brine Sensor

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The ATI-5010S Sump Brine Sensor is primarily used to detect rising or falling levels of brine in the interstitial space of double-wall tanks.  A leak in the tank causes a change in the brine level which moves the internal floats of the sensor and triggers an alarm.

Downloads

ATI-5010S data sheet
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ATI-5016  Petroleum Sensing Cable

image of 50 16 sensor

The ATI-5016A is a flexible cable sensor for detecting the presence of petroleum leaks around tanks, along pipes, in containment pans and trenches, and any other areas where a petroleum leak may happen.  Unlike many other petroleum-sensing cables, our cable can be reused even after it has been exposed to petroleum-based products.

Downloads

ATI-5016A data sheet
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ATI-5020  Liquid Level Probe

image of 50 20 probe
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Certified explosion-proof
Class I, Groups C & D

The ATI-5020 Liquid Level Probe provides up to 4 level detection points for most liquids.  The probe feature a stainless-steel tube assembly which is certified explosion-proof and rated for Class I, Groups C & D locations.

The ATI-5020 provides all the necessary features to monitor and operate a day tank that is connected to a supply tank in a Genset application.  It provides the necessary 4 incremental level detection points to indicate the overfill, pump-off, pump-on and empty fuel levels in the day tank.

Download the appropriate User Configuration Sheet to provide data for manufacturing the probe for your application.

Downloads

ATI-5020 data sheet
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User configuration sheet
for most applications
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User configuration sheet
for Oil/Water Separator
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ATI-5025A  Water Sensing Cable

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The ATI-5025A Water Sensing Cable detects the presence of water or other conductive liquids at any point along the cable.  This sensor is available in almost any length and is ideal for detecting the presence of water in basements, warehouses, museums, data rooms, ceilings, underground parking lots and tunnels.

Downloads

ATI-5025A data sheet
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ATI-5029  Liquid Level Measurement Probe

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Certified explosion-proof
Class I, Groups C & D

The ATI-5029 Liquid Level Measurement Probe provides continuous liquid level monitoring in increments of one inch or 2 cm, allowing accurate depth measurement readings.  This sensor is designed to be used with the ATI-DM335 display module.  The probe feature a stainless-steel tube assembly which is certified explosion-proof and rated for Class I, Groups C & D locations.

The ATI-5020 provides continuous fuel level monitoring in the supply tank in a Genset application.

Download the User Configuration Sheet to provide data for manufacturing the probe for your application.

Downloads

ATI-5029 data sheet
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User configuration sheet
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