Manufacturer of Level Switch, Level Transmitter,
Detector and Sensor DITECH,LTD.

If you are working in the field of academic research, research into innovative technologies, or materials research, feel free to consult DITECH about measurement. We can respond to your need for an extremely special item not yet available on the market and develop, design and fabricate even one single unit. DITECH also provides support to the user until the item becomes practical.

Sodium (Na) level measurement in atomic research at a temperature as high as 700 ºC.

Water-in-oil measurement in an environment exceeding the critical point of water at a high temperature as high as 400 ºC and a high pressure of 25 MPa.

Nonferrous metal level measurement in research on alloys at a temperature as high as 1000 ºC.

Plants that manufacture plastics, such as nylon, polyester and polyethylene, are extremely harsh environments in which gamma ray or other radiation-based level transmitters or switches are often used. If an accident occurs, however, risks imparted to the surrounding environment and negative impacts on the corporate image could be immense.
Drawing on its original ideas and combinations of high-strength sensors and capacitive detection technologies, DITECH has decades of experience in meeting level measurement needs of plastics manufacturing plants. Consult us if you are looking for a safer and more reliable measurement technology. We can also fulfill your needs for products that have passed high-pressure gas equipment testing.

Click here for more information on Various products.

Level measurement at a temperature as high as 320 ºC and an ultrahigh pressure of 80 MPa at low-density polyethylene plant (It is generally accepted that the only option is to choose a gamma ray-based level gauge. However, DITECH has created an optimal design for manufacturing capacitive detectors, which eliminates the need for troublesome radiation control and therefore substantially reduces management costs.)

DITECH has over forty years of manufacturing experience and offers approximately 3000 types of detection electrodes suitable for operation under various conditions. The following are just a selection of the many products we offer.

Measurement of char (fine carbon powder) under a high-temperature and high-pressure environment (450 ºC and 3.6 MPa) (Since char exhibits very low impedance, measurement of char by a commonly available capacitive system is prone to malfunctions and needs frequent readjustments. DITECH offers its proprietary capacitance-compensating (guard) system to enable measurement completely free of these problems.)

Click here for more information on Guard type Level switch.

Capacitive level transmitters are based on an excellent measurement system, measuring the level of the object to be measured, by an electrical means. However, if a radical change occurs in the permittivity of the object being measured, for example, a substantial temperature change or the addition of another component, the capacitive system would detect the change as a level change.
The solutions that DITECH has developed to counter this problem include mounting a liquid level measuring detector on the top of a tank and installing, at the tank bottom, a permittivity correcting detector, which constantly measures changes in the permittivity of the object being measured. The signal that the permittivity correcting detector outputs is used to arithmetically manipulate the signal of the liquid level measuring detector so as to output the correct liquid level, without being affected by permittivity changes of the object being measured.

Click here for more information on Relative permittivity-correcting Level transmitter.

Commonly available capacitive interface transmitters are valid only when, due to the nature of their measurement principle, the overlying and underlying liquids apparently differ in permittivity, as with oil (ε = 5 or less) and water (ε = 80 or more), or one liquid (oil in this context) exhibits sufficiently low permittivity and high impedance. Otherwise, these transmitters would become inoperative or subject to significant errors. Indeed, it is often the case at actual plants that both overlying and underlying liquids of the object to be measured contain an electrolyte, and implementation of correct interface measurement of such liquids is required. DITECH has developed interface transmitters for measurement of conductive liquids to fulfill these needs.
The idea is to measure the impedance, rather than the capacitance, of the object to be measured that exhibits high permittivity and dominant impedance, with both overlying and underlying liquids containing an electrolyte.

Click here for more information on Impedance type interface level transmitter.

This device has been developed as a safety device for large mill rollers used in a plastic extruder in order to avoid accidents resulting from human error.

A round rod sensor is installed in parallel with the roller. When an operator enters the zone defined by means of transducer settings, a warning alarm is issued and the warning light is lit. If the operator comes closer to the roller and the safety device recognizes the probability of an accident is high, a danger alarm is issued and the danger light is lit. Moreover, a signal is also output to shut down the roller. Since the sensor geometry is provided with a high degree of design freedom, applications for the safety device include equipment other than extruders, for example, rotary printing presses, as well as equipment that access by an operator could result in a major accident.

Proximity detectors using infrared lasers or ultrasonic waves are highly directional. Their measurement areas are limited. In contrast, detecting changes in capacitance as a three-dimensional phenomenon, our sensors are free of blind spots in their measurement areas.

Click here for more information on Three-dimensional presence detector.

Ditech has variety of special made-to-order products based on our manufacturing experience. Please feel free to contact us if you have any inquries.