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Hawk Measurement Systems is a manufacturer of high quality level instrumentation, including ultrasonic level transmitters, pressure transmitters, capacitive probes, and conductivity probes.

Their Sludge Density meters, Open channel flow meters, thermal dispersion flow, Capacitance level switches, Microwave level switches, rotating switches, Tuning fork level switches, ultrasonic level switches & transmitters are used in Environmental monitoring, Biotechnology & Pharmaceutical manufacturing, Natural gas utilities, Power generation & Processing, Pulp & Paper manufacturing and other industries.

Point Level Switches

The Gladiator Switch Series are all-round point level switches for detection of liquid, slurry or powder in a tank or vessel. Admittance, Conductivity, Vibration and Rotation switches are available.

Gladiator Admittance Switch                   Download printable brochure.

The Gladiator Admittance switch is an all-round point level switch for detecting level of liquid, slurry or powder in a tank or vessel. The unit measures the capacitance or "admittance" between a probe and the wall of the container. Operates in tough industrial environments and has an excellent immunity to product build-up.

Principle of Operation
The probe of the Admittance Level Switches forms one plate of a capacitance circuit, with the vessel wall making the second plate. The dielectric constant of the product between the probe and the vessel wall will cause a change of capacitance as the level approaches the probe. The change is detected, amplified and used to switch a relay for indication or control purposes. A special circuit is used to ignore product build-up between the sensing probe (active element) and guard, and also between the guard and vessel wall.

Primary Areas of Application

Gladiator Conductivity Switch                    Download printable brochure.

Gladiator Conductivity switches are suitable for most applications that involve a conductive liquid, including food and beverage processing, chemical, oil and gas, paint, paper, pharmaceutical and water/wastewater treatment plants.

Principle of Operation

A low voltage AC signal is applied between the probe electrode and the tank wall or reference electrode in the case of a non-metallic tank. When the liquid comes into contact with the electrode tip, a conductive path is established between the sense electrode and the metallic tank wall/reference electrode. Current flow due to the conductive path is sensed, amplified and used to switch a relay for indication or control purposes.

Primary Areas of Application

Gladiator Vibration Switch                        Download printable brochure.

Gladiator Vibration switches are for a wide range of liquids and solids. This type of switch is suitable for many situations requiring level detection, including pump control, high or low-level alarms, and detection of an interface between two different materials.

Principle of Operations

A stainless steel tuning fork is driven by piezo ceramic elements, causing it to vibrate at its resonant frequency. When the material to be detected covers the fork, vibrations are damped. The changed vibration is sensed electronically, and the processed signal is used to switch a relay for indication or control purposes.

Primary Areas of Application

Rotation Switch                                  Download printable brochure.

The Rotating Switch vane is driven by a slow speed synchronous geared motor. For safe and multi-purpose level monitoring in all types of containers and silos. It can be used with all bulk materials and powders as a point switch.

Principle of Operation

The rotating measuring vane is driven by a brushless synchronous motor. Once the material level reaches the vane, it stops rotating, which is detected by a micro switch to stop the motor and switch the level output. Once the material level begins to fall and the vane is free of material the motor will restart and the vane will rotate again.

Primary Areas of Application

• Plastic Industry - powder, granular, pellets etc
• Building Industry - lime, Styrofoam, molding sand, urea, cement, gypsum, crushed rock 
• Food Industry - milk powder, flour, salt, sugar, minerals, herbs, grain
• Paper & Pulp Industry - wood chips, saw dust etc
• Chemical Industry - rubber, coating, foam
• Steel Industry - iron ore, coal, coke, sand, fluxes

Gladiator Microwave Switch                              Download printable brochure.

The Gladiator Microwave provides point level switching for presence or absence of most solid and liquid materials. Used in any application where microwave energy is absorbed by the material being monitored, including replacement of traditional contact switching devices.

Principle of Operation 
A beam of microwave energy passes from a sender unit to a separate receiver in bursts approximately 200 times per second. If the path between the sender and receiver is blocked by any object or material which absorbs or reflects microwave energy, then the receiver will not be able to detect the signal. The presence or absence of the signal at the receiver is used to switch a relay for indication or control purposes.

Primary Areas of Application

Gladiator Acoustic Switch                                        Download printable brochure.

Non-contact self cleaning blocked chute detection switch. The Gladiator Acoustic Switch uses Acoustic Wave technology in a new Sender/Receiver form for blocked chute detection and anti collision for heavy machinery.

The Gladiator Acoustic Switch uses Acoustic Wave technology in a new Sender/Receiver form for blocked chute detection and anti collision for heavy machinery. The Gladiator Amplifier powers two AW Transducers which use special Hawk developed software where both units pulse and receive each others Acoustic echoes. When the path between the Transducers is blocked the units immediately detect the presence/absence change of the return signal and trigger a communications relay for indication or control purposes. The Transducers work both together and independently to detect pulse interference giving twice the application security.

Hawk’s Acoustic Wave Switches are self cleaning. The Acoustic Switch is designed for continuous operation in dusty, wet environments where other technologies fail. The power of each pulse (pressure wave) blows the water, moisture and build-up off the face of the diaphragm.

Typical Uses

• Blocked chute detection in wet or dry environments
• Wet screen blocked chute detection
• Nucleonic/tilt switch replacement
• Hi level alarm / Low level alarm
• Truck/machine detection (ROM bins, Primary Crusher Dump Pockets)
• Sewage sludge handling

 Primary Areas of Application

Gladiator Pump Protection Switch                          

The Gladiator Pump Protection switch can be used in applications where pipe or wall mounting with minimal protrusion is required. It can also be used to detect the presence of liquids to ensure the pump will never run dry.

Principle of Operations

The probe of the Pump Protection Switch forms one plate of a capacitance circuit, with the vessel wall making the second plate. The dielectric constant of the product between the probe and the vessel wall will cause a change of capacitance as the level approaches the probe. The change is detected, amplified and used to switch a relay for indication or control purposes. A special circuit is used to ignore product build-up between the sensing probe (active element) and guard, and also between the guard and vessel wall.

Primary Area of Application
The switch has immunity to build-up and monitor materials with a wide range of dielectric constants, so the system is applicable to a large variety of liquids