The DCTH Series LVDT transducers are for displacement / position measurement. They make an accurate position measurement of the movement of the armature (the sliding part) relative to the body of the displacement transducer.
These transducer uses the Linear Variable Differential Transformer (LVDT) principle which means that it is probably the most robust and reliable position sensor type available. The strength of the LVDT sensor's principle is that there is no electrical contact across the transducer position sensing element which for the user of the sensor means clean data, infinite resolution and a very long life. This series of displacement transducer is available as either an unguided, captive or spring return version.
Our DC to DC LVDT transducer has all of the benefits of the LVDT sensor principle with the added convenience of built-in LVDT electronics enabling a dc supply and dc output. As an option we can offer a 4- 20mA 2 wire connection to the transducer on some models.
The captive guided displacement transducers have bearings to guide the armature inside the measurement sensor. Captive LVDTs are for position measurement applications where guidance may be poor and end bearings may be required.
The unguided LVDTs the armature assembly is a separate component, to make a measurement the user must guide the armature inside the body without touching the sides. Unguided position measurement transducers are appropriate where external guidance is available and give truly non-contact operation
The spring displacement transducer has bearings to guide the armature inside the measurement sensor and a spring which pushes the armature to the fully out position. Spring return LVDTs are appropriate where it is not possible to connect the transducer armature to the moving component being measured.
|LVDT DCTH Series datasheet (English)
|LVDT DCTH Series electrical connection diagram (TM321AB, 4-20mA output) (English)
|LVDT DCTH Series electrical connection diagram (standard model) (English)
|LVDT DCTH Series electrical connection diagram (TM627, inverted DC output) (English)
|Application note AN211020A - Using 4-20mA sensors, 2-wire, with Novus N1040i display (Portuguese)
|Application note AN250919A - Using 4-20mA sensors, 3-wire, with Novus N1040i display (Portuguese)