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Level Monitoring Relays

Level monitoring relays are used to monitor fill levels as well as mixing ratios. The relay monitors both a minimum and maximum value, allowing it to control pumps to protect against tank overflow and dry operation.

Schneider Electric Harmony Control Relays monitor and detect abnormal operating conditions concerning current, phase, voltage, frequency, liquid level, temperature, speed and pump control. This information allows users to initiate the necessary corrective actions before serious breakdowns occur. Settings can be configured digitally using the Zelio NFC App. Monitoring parameters can be set precisely to the desired value and time delay can be set to minutes, seconds or milliseconds. Harmony Control Relays are suitable for a wide range of applications including: packaging, lifts, textile, pumping, and water.

Phoenix Contact EMD Monitoring Relays are available for a wide range of monitoring tasks to keep them within limits or to avoid the consequences of errors. The operating states are indicated using colored LEDs. Errors that may occur can be sent to a control system via a floating contact or can shut down a part of the system. Some devices are equipped with startup and response delays in order to briefly tolerate measure values outside the set monitoring range.

Products

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$101.10
Littelfuse PHST-38QTN is a probe holder specifically designed for liquid level probes. It is suitable for use in steam pressure environments of up to 240 PSI. With its high durability and functionality, it ensures accurate and reliable monitoring of liquid levels in various applications.
$266.77
Littelfuse PC-200-LLC-GM is a versatile load controller with a Pilot Duty output load rating of 480 VA @ 240 Volts and a General Purpose load rating of 10 A @ 240 Volts. It features torque termination for easy installation with 12 - 22 AWG solid or stranded wires. With an adjustable sensitivity range of 4.7 - 100 Ohms, pulse-sensing technology, and a debounce time delay of 2 seconds, this controller ensures precise and reliable operation. Suitable for 50/60 Hz AC line frequency, it can be used in a wide range of applications.
$266.77
Littelfuse PC-200-LLC-CZ is a versatile product suitable for pilot duty and general purpose applications, delivering a load rating of 480 VA at 240 Volts and 10 A at 240 Volts respectively. With torque termination of 12 in-lbs. and accepting 12-22 AWG solid or stranded wires, it caters to a wide range of installations. Featuring an input AC line frequency of 50/60 Hz (50 Hz increases all delay timers by 20%), it ensures efficient operation. With 10-95% non-condensing humidity tolerance as per IEC 68-2-3, it proves resilient in diverse environments. Other notable features include a maximum input power of 5, a sense voltage of 5 Volts (DC) pulsed (probe), a 2-second debounce time delay, and adjustable sensitivity ranging from 4.7 to 100 Ohms.
$938.02
Littelfuse PC-105 is a versatile device with a torque termination type. It has a pilot duty output load rating of 480 VA at 240 Volts B300 and a general purpose rating of 7 A at 240 Volts. It supports wire sizes ranging from 12 to 20 AWG. With a 50/60 Hz input AC line frequency, it offers a maximum input power of 4 units. Its sense voltage is 5 Volts (DC) and it operates in sensor mode with a 1 relay latched / time delay output. The time delay option ranges from 2 to 255, making it suitable for lag pump delay.
$350.88
Littelfuse PC-102CICI-LT is a versatile control relay with a pilot duty output load rating of 180 VA @ 120 Volts C150 and a general-purpose output load rating of 5 A @ 240 Volts. It features a torque termination type of 6 in-lbs for easy installation with 12-20 AWG wire compatibility. With an input AC line frequency of 50/60 Hz and a maximum input power of 2, it offers reliable performance. The sense voltage is 5 Volts (DC) pulsed with selectable sensitivity options for TEMP input and adjustable SEAL input. The input logic can be direct or inverted.
$350.88
Littelfuse PC-102CICI-DL is a versatile product with a Pilot Duty output load rating of 180 VA @ 120 Volts C150 and a General Purpose rating of 5 A @ 240 Volts. It features torque and wire termination types, supports a wide input AC line frequency range of 50/60 Hz, and has a maximum input power of 2. The sense voltage is 5 Volts DC pulsed, with a sensitivity range of 4.7-100 Ohms. Additionally, it offers selectable 4 Ω temperature settings with DIP switches and can be used with either direct or inverted input logic. Compatible with Depluggable Phoenix Contact - Series MSTB plugs or equivalents.
$266.77
Littelfuse PC-100-LLC-GM is a versatile device with a pilot duty output load rating of 480 VA at 240 volts and a general purpose rating of 10 A at 240 volts. It features a torque termination type, accommodating 12 - 22 AWG solid or stranded wires. With an input AC line frequency of 50 / 60 Hz, it is suitable for various applications. The device operates under 10 - 95% non-condensing humidity conditions and has a maximum input power of 5 watts. It has a sense voltage of 5 volts (DC) pulsed and a debounce time delay of 2 seconds. The sensitivity can be adjusted between 4.7 - 100 Ohms to suit different requirements.
$266.77
Littelfuse PC-100-LLC-CZ is a compact and versatile power controller designed for various applications. With a pilot duty rating of 480 VA at 240 volts and a general purpose rating of 10 A at 240 volts, it provides reliable power output. It features torque termination for easy installation, supports multiple input AC line frequencies, and operates in a wide humidity range (10-95%). The adjustable sensitivity (4.7-100 ohms) ensures precise control, while the 2-second debounce time delay enhances accuracy. With a maximum input power of 5 watts and a 5-volt pulsed sense voltage, it delivers efficient performance.
$82.66
Littelfuse LLP-24 is a liquid level probe sensor, designed to accurately detect liquid levels. With its compact design, it can be easily integrated into various applications. This sensor provides reliable and precise liquid monitoring, making it an ideal choice for industries requiring accurate liquid level measurements.
$280.70
Littelfuse ALT-200-3-SW is a versatile power module with a maximum input power of 5 VA, suitable for pilot duty up to 480 VA @ 240 Volts or general purpose applications up to 10 A @ 240 Volts. It features torque termination for easy installation and can accommodate 12-22 AWG solid or stranded wires. With a debounce time delay of 5s, it ensures optimal performance. Rated for 50/60Hz AC line frequency and can operate under 10-95% non-condensing humidity conditions.
$280.70
Littelfuse ALT-100-3-SW is a versatile product with a Pilot Duty output load rating of 480 VA at 240 Volts and a General Purpose load rating of 10 A at 240 Volts. It features torque termination for easy installation with 12 - 22 AWG solid or stranded wires. With an input AC line frequency of 50/60 Hz and a humidity range of 10 - 95%, it is suitable for various environments. Its maximum input power is 5 watts, and it has a debounce time delay of 5 seconds.
$236.02
Littelfuse ALT-100-1-SW is a versatile product with a pilot duty rating of 480 VA at 240 Volts and a general purpose rating of 10 A at 240 Volts. It has a torque termination type for easy installation and accepts solid or stranded wires of 12-22 AWG. With an input AC line frequency of 50/60 Hz and a humidity range of 10-95%, it adheres to international standards. The maximum input power is 5 and it has a debounce time delay of 1s.