Manufacturer of Level Switch, Level Transmitter,
Detector and Sensor DITECH,LTD.
DITECH,LTD.
Vibrating Level switch for sediment
DTA-D
STA-D
proof
construction
Non-explosion-proof
Intrinsically safe construction(i3nG5)
system
Electrostrictive system(Type A)
Magnet bias system(Type M)
This level switches are designed to detect the level of sediment in water or liquid.
measured
sand or slurry settled in purified water, seawater or oil |
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This level switch is suitable for water storage tanks and excavated-material tanks in order to detect the level of underwater (seawater) settling sand or slurry.
Vibrating level switches for sediment offer features such as highly safe operation due to seal welding as well as simple maintenance. Their sensitivity can be adjusted to detect various materials ranging from activated sludge to earth.
principles
Under this system, the tip of the detecting element, which consists of a single metal rod,
is delicately vibrated. The detecting element's vibration control characteristics vary according to the substance being measured and the resulting signal forms the basis of an accurate level measurement. By adjusting the strength and frequency of the vibration, the system can be employed for measurement of a wide variety of substances.
Two operating methods-employing electro distortion and magnet bias are available.
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Wide and flexible measurement application range encompassing powders, granular materials and solutions.
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High mechanical strength achieved by constructing all liquid-contact parts of metal, thereby allowing dimensional flexibility while retaining the strength and durability to repeatedly bear high loads. The lineup includes the models designed for ultra-high pressure and high-vacuum conditions. Flat face type without protrusion into tank is also available.
Click here for information on Vibrating level switch
Click here for information on Vibrating flat type level switch
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Vibrating level switches with a straight-rod probe can be installed through a 25A nozzle.
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High stability and long operating life thanks to a delicate vibration system that doesn’t expose the detecting element to fatigue.
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Our mechanical level switches (Model DTA-D and STA-D) with characteristic vibration (self-excited vibration) can prevent from forming the rat hole while general mechanical level switches have disadvantage of easily generating the rat hole.
| Output contact | Model DTA-D： a, c, b 200V 1A 100VA (Non-inductive load) / Open collector / Thyristor / SSR Model STA-D(Model PS-7)： a, c, b 200V 1A 100VA (Non-inductive load) |
| Input power | Model DTA-D： AC105V/210V 50/60Hz or DC24V Model STA-D (Model PS-7)： AC105V/210V 50/60Hz |
| Power consumption | Model DTA-D： 5W Model STA-D： 4W |
| Vibration frequency | 100Hz～10KHz (Depends on the specifications) |
| Allowable temperature | Detector： －200℃～＋600℃ (Depends on the specifications) Transducer： Model PS-19D： －10℃～＋50℃ Transducer： Model TR-7D： －25℃～＋70℃ Power source： Model PS-7： －10℃～＋50℃ Special cable： Model RG(standard type)： －10℃～＋60℃ Special cable： Model TEF(heat resistance use)： －200℃～＋260℃ |
| Allowable load | Detector： 500㎏ Concentrated at detection tip (Depends on the specifications) |
| Allowable pressure | Detector： 10MPa (approx. 102kg/cm2G) (Depends on the specifications) |
| Weight | Transducer： Model PS-19D： 2.0kg Transducer： Model TR-7D： 1.75kg Power source： Model PS-7： 2.0kg |
| Size | Transducer： Model PS-19D： 154(W)×95(D)×166(H) Transducer： Model TR-7D： 154(W)×95(D)×166(H) Power source： Model PS-7： 80(W)×101(D)×210(H) (mm) |
| Installation | Detector： Flange mounting Screws mounting Ferrule IDF, etc. |
| Material | Detector： SUS304 SUS316 SUS310 SUS321 SUS329 Hastelloy, etc. Lining： PTFE Rubber, etc. Head case： Light alloy SUS304 Salt resistant paint case, etc. |
Model DTA-D-1
(Non-explosion-proof type)
＜Integrated transducer unit type＞
This model is of compact type in which both detector unit and transducer (relay power source) are integrated.
Model DTA-D-2
(Non-explosion-proof type)
＜Separated transducer type＞
This model is composed of detector unit, transducer (relay power source) and special cable. Transducer may be installed far from the area exposed to Heat, Steam, Vibration, Powder or Gas. This has the same characteristics as those of Integrated transducer unit type as to performance.
Model STA-D-1
(Intrinsically safe construction / i3nG5)
＜Integrated transducer unit type＞
This model is composed of detector unit with self-contained transducer and relay power source (Model PS-7). The transducer contained in the detector head requires no special cable. For this reason, the dangerous area may be kept away unlimitedly from the safe area. As to performance, this model has the same characteristics as those of Model DTA-D.
Model STA-D-2
(Intrinsically safe construction / i3nG5)
＜Separated transducer type＞
This model is composed of detector unit, transducer, relay power source (Model PS-7) and special cable. The transducer may be installed far from the area exposed to Heat, Steam, Vibration, Powder or Gas. This model has the same characteristics as those of Model DTA-D and the equivalent performance to those of Integrated transducer unit type.
