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For over 50 years Warrick® Controls have offered dependable no-moving-parts control and monitoring of conductive liquids. Now as part of the Gems™ Sensors family, Warrick® conductivity controls continue to offer reliability, process automation, labor savings, flexibility and operator safety at economical cost. The concept is simple: take advantage of a liquid’s conductive properties to complete a circuit and cause a control relay to actuate. Use of permanently-mounted stationary electrodes gives the user precise accuracy, repeatability and no-moving-parts reliability. This simple concept has led to the development of a complete line of conductivity-based liquid level detectors, water level detectors, and control units and electrode fittings shown here. For OEM’s we also have the capability to custom configure liquid level control units and electrode fittings to meet your specific application requirements.
System Components
- The liquid level control unit is an electrical device with contacts that open and close in response to liquid levels sensed by the probes. Because it is wired directly to the power source and to the sensing source, it can send signals that activate or de-activate solenoids, pumps, alarms or pressure switch devices. Warrick® controls are available in many different designs and sensitivity ratings for a wide range of application requirements.
- The fitting is a housing that holds the probes (or floats), insulates them from the vessel, and provides a means of connection to the control. Warrick® fittings are available for single-probe or multi-probe applications, for mounting to vessels in a variety of ways, and in open or pressure tight styles.
- The probe is a sensor that extends downward from the fitting, with the tip positioned precisely at the level where the control should be activated. Warrick® probes are available in a variety of materials to suit different liquids and a variety of lengths to fit different depth requirements.
The liquid level control system shown here is designed for “pump up” application. The pump will start refilling the vessel when the liquid reaches the lower probe tip, then stop refilling the vessel when the liquid reaches the higher probe tip.
Types of Liquid Level Controllers:
General Purpose Water Level Controllers
General purpose controls are compact in size, provide various time delays, and solid state reliability. Applications that general purpose controls are typically seen in are single-level service, point level, valve control, differential service, alarms, and pump controls.
General Purpose Water Level Control Products:
Low Water Cut-Off Level Controls
Low water cut-off controls are designer for low-water cutoff protection. Gems low water cut-off controls meet CSD1 requirements. They also have the option of time delays and test feature functions.
Low Water Cut-Off Level Control Products:
Liquid Level Relays
These relays boost your sensor’s load handling ability in non-hazardous locations with the reliability and advantages inherent in solidstate controls.
Liquid Level Relay Products:
Intrinsically Safe Liquid Level Controls
Render any non-voltage-producing sensor, switch or conductivity electrode intrinsically safe with these relays and barriers from Gems. They amplify sensor loadhandling capabilities in a wide range of AC and DC control switching applications., and are
easy to install in standard circuit boxes in non-hazardous areas. The amount of energy they send to sensors and switches within hazardous areas is insufficient to cause ignition of a specific hazardous atmospheric mixture in its most ignitable concentration.
Select from a broad choice of Safe-Pak® and Warrick models.
Liquid Level Controller Applications and Industries:
- Alternative Energy
- Food and Beverage
- General Industry
- HVAC/R – Boiler
- Marine
- Oil and Gas
- Process
- Water and Wastewater
Conductivity Liquid Level Controls
Catalog Pages
Gems Sensors Catalog, LWC-700/720
View the Gems Sensors & Controls LWC-700/720 catalog page.
Gems Sensors Catalog, A and AM Alternators
View the Gems Sensors & Controls A and AM Alternators catalog page.
Gems Sensors Catalog, 17/27 Controls
View the Gems Sensors & Controls 17/27 Controls catalog page.
Conductivity Liquid Level Controls
Installation Instructions
Gems Sensors Instructions, Warrick Dual Function Control
Download the Gems Sensors & Controls Warrick Dual Function Control installation instructions bulletin.
Gems Sensors Instructions, Warrick Direct Current Controls
Download the Gems Sensors & Controls Warrick Direct Current Controls installation instructions bulletin.
Gems Sensors Instructions, Warrick A/AM Alternators
Download the Gems Sensors & Controls Warrick A/AM Alternators installation instructions bulletin.
Gems Sensors Instructions, Warrick 26M Controls
Download the Gems Sensors & Controls Warrick 26M Controls installation instructions bulletin.
Gems Sensors Instructions, Warrick 19MR Controls
Download the Gems Sensors & Controls Warrick 19MR Controls installation instructions bulletin.
Gems Sensors Instructions, 16DM
Download the Gems Sensors & Controls 16DM installation instructions bulletin.
Gems Sensors Instructions, Warrick 16 Controls
Download the Gems Sensors & Controls Warrick 16 Controls installation instructions bulletin.
Gems Sensors Instructions, Warrick 67 Control
Download the Gems Sensors & Controls Warrick 67 Control installation instructions bulletin.
Gems Sensors Instructions, Warrick 47 Series
Download the Gems Sensors & Controls Warrick 47 Series installation instructions bulletin.
Gems Sensors Instructions, Warrick 27 Controls
Download the Gems Sensors & Controls Warrick 27 Controls installation instructions bulletin.
Gems Sensors Instructions, Warrick 26 Controls
Download the Gems Sensors & Controls Warrick 26 Controls installation instructions bulletin.
Gems Sensors Instructions, Warrick 17 Controls
Download the Gems Sensors & Controls Warrick 17 Controls installation instructions bulletin.
General Purpose
Water Level Controllers
16M Plug-in Control Module
Series 16M Solid State Plug-in Modules offer general purpose, high-sensitivity and field-sensitivity control as well as a DPDT load contact option. Series 16M - General Purpose Designed for either differential or single-level service. U.L. "Motor...
Series 16 Open Board Control Module
Series 16 Open Board Module is engineered for general purpose single-level or differential applications. These controls have spade terminals for easy wiring and provide sensitivities up to 1 million Ohms/cm. Series 16D controls are similar to...
Low Water Cut-Off
Level Controls
Series 26M Conductivity Based Liquid Level Control
Series 26M Low-Water Cutoff Plug-In Module is designed for low-water cutoff protection and meets CSD1 requirements for boiler low-water cutoff. Series 26M features powered contacts. If non-powered contacts are required, please contact factory and...
Series 26 Conductivity Based Liquid Level Control
Series 26 Low-water cutoff open board is designed for boiler low-water cuatoff protection. A snap-through standoff mounting device is available for the Series 26. Optional Power Outage feature resets after nuisance outages. The optional reset...
LWC-800 Series Low Level Cut Off Control
Gems LWC-800 is designed for boiler low-water cutoff protection, and offers the most compact package for boiler and steam generators. For added safety, the sensor assembly incorporates redundant reed switches at the actuation level. The LWC-800...
LWC-720 Series Low Level Cut Off with Pump Control
Gems LWC-720 is designed for boiler low-water cutoff protection, and offers the most compact internally mounting package for boiler and steam generators. In addition to the low level cutoff switch, the LWC-720 Series includes a high level switch,...
LWC-700 Series Low Level Cut Off Control
LWC-700 Series Low Level Cut Off Controls are designed for boiler low-water cutoff protection and offers the most compact internally mounting package for boiler and steam generators. For added safety, the sensor assembly incorporates redundant...
Liquid Level
Relays
Series A & AM Conductivity Based Liquid Level Control
Series A & AM Conductivity Based Liquid Level Control has an open circuit board design. Series AM provides convenient plug-in design, either octal socket or DIN mount. The housing carries no NEMA rating.Power Outage Time Delay Available on...
Series 19MR Conductivity Based Liquid Level Control
Series 19MR Conductivity Based Liquid Level Controls are the ideal choice where pump up or pump down service is necessary. This control eliminates the need for contactors because it can directly handle motors up to 1 HP at 120 VAC, or motors up to...
DC Series Conductivity Based Liquid Level Control
DC Series Conductivity Based Liquid Level Controls are designed for applications where only direct current power is available. DC units can be used as differential level controls or single point alarm contactors. The design features solid state...
Intrinsically Safe
Liquid Level Controls
Series 67 Conductivity Based Liquid Level Control
Series 67 Conductivity Based Liquid Level Control is an ideal solution for liquid level problems in hazardous locations for the sewage, waste water, chemical and groundwater pump/solenoid valve control; automatic or manual alternation; high and/or...
Series 27 Conductivity Based Liquid Level Control
Series 27 Conductivity Based Liquid Level Controls are intrinsically safe controls with SPDT output contacts and are UL approved for use in Class I, Groups A, B, C & D; Class II, Groups E, F & G; and Class III hazardous locations. Control...
Series 47 Conductivity Based Liquid Level Control
Series 47 Conductivity Based Liquid Level Controls offer complete alarm panel control in a single package. Powered output contacts allow quick connection of lights and audible alarms. Test and silence functions are built in. The unit also carries...