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DC-Operated, Short-Stroke
Unguided Armature
 

"SUM" Sealed LVDT Series (DC)

Designed for use while submerged under fresh water and most other non-corrosive liquids and gases, these LVDT's are extensively used in industrial and R&D applications.  They are designed to operate in pressures of up to 10 bar using the standard connector (optional electrical terminations allow up to 206 bar).

The welded stainless-steel body is hermetically sealed and has a cable exit which is double-sealed using an internal rubber gland plus a polyolefin shrink tube covering the cable and transducer body.  An alternative MI stainless-steel sheathed cable option is available for use under high liquid pressures (as in soil testing apparatus, hydraulics, vessel studies, etc.)

General Specifications are given below.

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DC "SUM" Series

Dimension "X" is at the Electrical Zero Position

LVDT
Model

Nom.
Linear
Range
(in. / mm)

Dimensions (in. / mm) Total
Weight
(oz. / g)
"L" "X" "D" "A"
DSD200SUM   ±0.1
±2.5
2.68
68
1.3
33
0.813"
(13/16")
20.6
2.44
62
11
306

DSD400SUM  

±0.2
±5

DSD600SUM  

±0.3
±7.5

DSD800SUM  

±0.4
±10

 

General DC "SUM" Specifications  [Top ]

(See also the statement on LVDT specifications)

Supply Requirements, SINGLE*

Using ±5 VDC Output: +20 to +40 VDC, 30 mA
Using 0-10 VDC Output: +24 to +40 VDC, 30 mA

Supply Requirements, DUAL

Using ±5 VDC Output: ±10 to ±20 VDC, 30 mA
Using 0-10 VDC Output: ±12 to ±20 VDC, 30 mA

Armature

UNGUIDED

Linearity (% error of full scale, worst case)

±0.5%**

Standard Output (in/out)

-5 to +5 VDC (+0%, - 5%) or 0 to +10 VDC (+0%, - 5%)

Output Fluctuation with Supply Fluctuation

±5 VDC Output: 1.25 mV/V, typical
0-10 VDC Output: 5 mV/V, typical

Output Load (minimum)

±5 VDC Output: 2 kΩ
0-10 VDC Output: 2 kΩ (10 kΩ when supply < 26 V)

Output Ripple

30 mV peak-to-peak

Output Bandwidth (electrical)

200 Hz (flat)

Output Impedance 

2 Ω

Temperature Coefficient (Zero and Span)

±0.01% of full scale/°C (±0.005% of full scale/°F)

Operating Temperature Range

-51° C to +80° C (-60° F to +176° F)

Electrical Termination

6.5 ft. (2 m) shielded cable***

* Must be floating with respect to output.

** ±0.25% and ±0.1% linearity are optional on some models (contact the factory for details).

*** Longer cable available to order; alternative electrical termination optional (contact the factory).

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