-30...250°C - 0...160ºC

The Clorius Duostats are thermostats, type V, which via two sensing elements in a common hydraulic system act on one and the same control valve. Two basic types are available: Clorius V4.05- or Clorius V4.10 duostat, depending on the preferable proportional band PB, and the valve size. The sensing elements are two spiral sensors for the ventilation duct or two-rod sensors (a combination of one spiral sensor and one-rod sensor may be supplied in certain combinations). The effect, which the two sensing elements have on the adjustment, is proportional to the liquid volume of the individual sensors. Duostats are therefore available with varying proportions between the liquid volumes of the two sensors (sensor proportions) and in that way they can meet the requirements made by a number of different adjustment problems. As the adjustment result is a weighted average value of the temperatures of the two sensors, nofixed adjustment value can be indicated. Hence, Duostats are not equipped with a temperature scale, but with a marking for adjustment towards higher or lower temperatures, respectively.

The WIKA TR21-A resistance thermometer provides temperature measurement in sanitary applications and can be used for the measurement of liquid and gaseous media in the range of -30 … +250 °C (-22 … +482 °F). For application in hazardous areas, intrinsically safe versions are available. These thermometers are fitted with thermowells, whose process connections meet the stringent requirements, in terms of materials and design, of hygienic measuring points. All electrical components are protected against moisture (IP67 or IP69K). The resistance thermometer is available with direct sensor output or integrated transmitter, which can be configured individually via the PC configuration software WIKAsoft-TT. Measuring range, damping, error signalling per NAMUR NE43 and TAG no. can be adjusted. For easy calibration or maintenance, the sensor is removable without having to break into the process or disconnect the electrical connection. Thus hygiene risks can be minimised, and downtimes can be reduced. The spring loading, integrated into the union nut, guarantees the contact between the sensor tip and the bottom of the thermowell and thus ensures a short response time and lasting high accuracy. The welded junction between the thermowell and the flange makes the use of a sealing as additional material in those areas redundant which are in contact with the product. Insertion length, process connection, sensor and connection method can each be selected for the respective application within the order information. The electrical connection is made via an M12 x 1 circular connector. For applications requiring the sterilisation of the instrument in autoclaves, an especially temperature-resistant instrument version is available.

The temperature controller, which consists of a thermostat and a valve, is used to control the temperature in central heating systems, district heating systems, industrial plants or industrial processes, and marine systems. The Clorius V2 / V4 / V8 Self-Acting Thermostats can be used to control cold or hot water, steam or oil in heating and cooling systems. Thermostat A thermostat consists of a sensor and a capillary tube, fi filled with liquid, and an adjusting cylinder. The thermostat type designations and technical data are specifi ed in fi g. 2. With temperatures above 170ºC, a cooling unit must be fi fitted between the valve and the thermostat – see fi g. 1. The thermostat is self-acting and works on the principle of liquid expansion, it is sturdy in its design, and works with a large closing force – see fi g. 2 Sensor The following sensor types are available : Rod sensor in copper or stainless steel and spiral sensor in copper with threaded connection according to ISO R7/1. Spiral sensor (copper only) with air duct flange. Rod/spiral sensor with steel flange DN 50, PN 40 and DN 50, PN 160. Sensor without connection. Usually used with capillary pack box for temperature control in tanks. Capillary Tube The capillary tube is made of copper, stainless steel, or PVC-coated copper but can also be delivered with flexible iron tube protection.