HCD Series  Hermetically Sealed DC LVDT 
HCD-Series Rev. 5 
www.meas-spec.com       
2013-July 
1/4 
?   Hermetically sealed, all welded 
?   Stainless steel housing 
?   High level ?/SPAN>10VDC output 
?   Stroke ranges from ?/SPAN>0.05 to  ?/SPAN>10 inches 
?   Shock and vibration tolerant 
?   MS style connector 
?   IEC IP68 rating to 1,000 PSI [70 bars] 
?   Captive core option 
 
DESCRIPTION 
The  HCD  Series  hermetically  sealed  DC  operated  LVDTs  are  the  perfect  choice  for  high  performance 
measurements  in  environments  containing  moisture,  dirt,  and  fluid  contaminants.  Operating  on  a  nominal 
?5VDC supply, these heavy-duty LVDTs deliver an extremely linear, low noise, yet high frequency response 
?0VDC output. 
 
 
The  integral  electrical  connector  (welded,  glass-sealed  MS  type)  provides  for  easy  installation  and  allows 
replacing a damaged cable without sacrificing the sensor. 
 
The HCD is available in stroke ranges of ?.05 inch [?.27mm] up to ?0 inches [?54mm], and with a number 
of standard options including imperial or metric threaded core, guided core and captive core. 
 
Like  in  most  of  our  LVDTs,  the  HCD  windings  are  vacuum  impregnated  with  a  specially  formulated,  high 
temperature, flexible resin, and the coil assembly is potted inside its housing with a two-component epoxy. This 
provides excellent protection against hostile environments such as high vibration and shock. 
 
Captive core option:
 The HCD features an optional captive core design (available for most models) that greatly 
simplifies installation. The core rod and bearing assembly includes a Bronze bearing on the front end for self-
alignment, while a PTFE sleeve allows low-friction travel through the stainless steel boreliner (spool tube). The 
core rod and the bearing assembly are both field serviceable. 
 
Also see our other LVDT models with built-in signal conditioning: DC-EC (盌C voltage), DC-SE (single-ended 
DC voltage), HC-485 (RS485 Digital Series) and the HCT (4-20mA, 2-wire loop). 
 
Measurement Specialties, Inc. (NASDAQ MEAS) offers many other types of sensors and signal conditioners. 
Data sheets can be downloaded from our web site at: http://www.meas-spec.com/datasheets.aspx
 
 
Measurement Specialties acquired Schaevitz Sensors and the Schaevitz
TM
 trademark in 2000. 
 
 
FEATURES 
APPLICATIONS
?   All-welded stainless steel construction 
?   Harsh industrial environments 
?   Shock and vibration tolerant 
?   Pressurized installations up to 1,000 psi 
?   Low noise  ?/SPAN>10VDC out ut 
?   Paper processin  mills 
?   Double ma netic shieldin  
?   Roller gap position feedback 
?   MS t   e connector  MIL-C-5015  
?   Automated test s stems 
?   Calibration certificate supplied with each unit 
?   X-Y Positional Feedback