The sensor is a magnetostrictive device consisting of a diaphragm, nickel tube, magnet, drive coil
The sensor is a magnetostrictive device consisting of a diaphragm, nickel tube, magnet, drive coil and pickup coil
When 40 kHz energy is applied to the drive coil, it causes the diaphragm to vibrate at a frequency determined by the mechanical resonant system of the sensor. Electrical energy is transferred to the pickup coil when the diaphragm is free to move in gas. When the diaphragm motion is loaded by a process material, less energy is transferred to the pickup coil.
The pickup coil of the sensor is connected to the input of an amplifier and the output of the amplifier to the drive coil to form a feedback loop circuit. Any energy appearing in the output of the sensor will be fed to the amplifier, amplified, and returned to the input of the sensor. This causes vibrations at 40 kHz to occur in the diaphragm and furnish a signal back to the amplifier for reamplification. When the gain of the amplifier is adjusted so as to exceed the losses within the sensor, continuous oscillations are produced. If the diaphragm of the sensor is exposed to a process liquid product which offers greater mechanical resistance to the motion of the diaphragm, the transfer of energy to the pickup coil decreases. This results in a decrease in the signal feedback into the amplifier and a corresponding decrease in the signal available from the output of the amplifier. The decreased signal triggers a voltage sensitive network that controls the output relay. A unique AUTO TEST self-checking circuit constantly verifies the integrity of the sensor circuits. The RED LED is illuminated when the product is present at the sensor and the system is not oscillating at approximately 40 kHz. If the amplitude or the frequency of the sensor circuits changes, the RED LED will come on. If the change of state occurs due to a level change, the relay will follow and change its state. However, if the change of state is due to a sensor failure or some other component failure, the relay will immediately transfer to the alarm condition. This foolproof feature protects the system for loss of power, major component failure or damaged sensor conditions. The SONAC®/110B system will fail safe for all sensor or component failures except for open sensor in the low level fail safe mode.
Please inquire for NIST Certification.
Function
Single Point Switch for On-Off Control of Liquids
Typical Uses
High Level Alarm or Control
Pump Control or Inlet Starvation Alarm
Flow/No Flow Indication
Low Level Alarm or Control
Features
Auto Test self-checking The unique self-checking feedback loop constantly "proves" that the control is working properly and offers superior reliability in critical applications.
Really Fail-safe The SONAC®/110B is designed so that any electrical or mechanical failure of sensor or component will cause a change of state to the Fail Mode. Redundant circuit components are used in critical locations.
Stable, dependable performance This sensing technique provides a wet/dry ratio of 100:1 to provide dependable performance year in and out, without periodic adjustment. No false trips due to surge of splashing liquids
Compact The electronic amplifier is located in an integral explosion proof housing threaded to the rear of the sensor.
Versatile power supply The standard units are designed to accept 115 VAC, 230 VAC or low voltage DC input power.
Non-intrusive The sensor need not extend into the vessel beyond 1¼4". This feature minimizes the possibility of product bridging.
Rugged The all stainless steel, heavy duty sensor resists damage from product abrasion or corrosion. No packing glands are used.
CSA Approved
FM Approved
2 year warranty
Applications
Where liquids to be sensed constantly change physical or electrical properties. The SONAC®/110 principle of measurement is used with extremely small vessels or pipes and when little or no intrusion into the process is required
Non-dedicated vessels-liquids
The device senses virtually any liquid and does not need adjustment when the density or dielectric constants are changed
High temperature, high pressure service
The welded, all stainless steel sensor body is designed for service at temperatures to 220°F (104°C) and pressures to 2000 psig
Fluids with foam blankets
The control ignores foam to indicate the true liquid level
The SONAC®/110B provides the most reliable overflow alarm or control available
CAT NO.
MODEL
DEscRIPTION
AVAIL
PRICE
DV841101
110-B
COMPACT LIQUID LEVEL SWITCH **
Yes
918,000
Please inquire for NIST Certification
DV841103
95
GENERAL PURPOSE SENSOR W/NON- STICK TEFLON
Yes
788,400
Please inquire for NIST Certification
DV841104
93
SANITARY SENSOR
Yes
861,840
Please inquire for NIST Certification
DV841105
94S
GENERAL PURPOSE 316 SS SENSOR
Yes
615,600
Please inquire for NISTCertification
DV841106
99
HASTELLOY "C" FOR CORROSIVE CHEMICALS
Yes
1,717,200
Please inquire for NIST Certification
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