463 Mount Eden Rd., Mount Eden, Auckland 1024, New Zealand
Phone:+64 9 630-7871
Fax:+64 9 630-1720
Mobile:+64 27 279-6001
email:sales@mandeno.co.nz
Sensors & Instrumentation-Linear Displacement-DC LVDT-RDP DCTH Family
RDP DCTH500C for ±12.5mm, captive guided core
RDP DCTH500C LVDT with captive guided core and extension rod, range ±12.5mm, 4-20mA output.
Order Code:DCTH500C-TM0321A
The popular and versatile RDP DCTH series is available with an unguided core, captive guided core or spring loaded core.
The series features are:
High cycle life
Stainless Steel case and extension rod
High resolution
Voltage or 4-20mA, according to order code.
Powered ±15 to 30Vdc or a floating single ended supply.
option -TM0321A provides moisture sealing for the electronics. Recommended for most NZ applications.
With inbuilt DC electronics this series is very easy to apply with an external DC power supply.
Accessories expand the range of applications making this one of the most versatile general purpose DC LVDT's available.
PRODUCT SPECIFICATIONS
RDP Electronics Ltd., DC LVDT Series DCTH
V output
Supply voltage (dual)
±12V to ±20V dc, 30mA
Supply voltage (single, must be floating)
24V to 40V dc, 30mA
Change in output for change in supply
5mV/V
Output load
10kOhms
Output ripple
30mV (peak-to-peak)
Electrical output bandwidth
200Hz
Output impedance
2 Ohms
Operating temperature range
-40°C to 80°C
4-20mA output (>=±12.5mm)
Supply voltage
12V to 36V dc
Max loop resistance
(Supply voltage-11) x 50Ω
Output ripple
50uA (peak-to-peak)
Electrical output bandwidth
200Hz
Operating temperature range
-10°C to 70°C
Both outputs
Temperature coefficient (zero)
±0.01% F.S. /°C (typical)
Temperature coefficient (span)
±0.03% F.S. /°C (typical)
Electrical termination
2m (integral cable). Longer cable available to order.
ELECTRICAL OUTPUT DETAILS
(outputs 1 and 2 selected using different electrical connections)
On an unguided LVDT, 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, enabling truly non-contact operation.
DCTH100 to DCTH400
D1 = 20.6mm
ID = 2.54mm
D3 = 2.0mm
D4 = 2.0mm
TF = M3x0.5
DCTH500 to DCTH8000
A = 9mm
D1 = 20.6mm
ID = 6.8mm
D3 = 4.75mm
D4 = 5.97mm
TF = M5x0.8
Type
Range
Linearity error (% F.S.)
L
X
Total weight
Armature weight
TF
Over-Travel Inward Overtravel
DCTH100
±2.5mm
<±0.5/±0.25/±0.1
64mm
33mm
74g
1.4g
18mm
11.6mm
DCTH200
±5.0mm
<±0.5/±0.25/±0.1
64mm
33mm
74g
1.8g
18mm
9.0mm
DCTH300
±7.5mm
<±0.5/±0.25/±0.1
64mm
33mm
74g
1.8g
18mm
6.5mm
DCTH400
±10mm
<±0.5/±0.25
64mm
33mm
74g
1.9g
18mm
3.9mm
DCTH500
±12.5mm
<±0.5/±0.25/±0.1
175mm
43mm
213g
17g
15mm
16mm
DCTH1000
±25mm
<±0.5/±0.25/±0.1
203mm
69mm
270g
23g
15mm
22mm
DCTH2000
±50mm
<±0.5/±0.25/±0.1
317mm
81mm
369g
37g
15mm
16mm
DCTH3000
±75mm
<±0.5/±0.25/±0.1
430mm
119mm
497g
55g
15mm
29mm
DCTH4000
±100mm
<±0.5/±0.25/±0.1
475mm
132mm
625g
71g
15mm
16mm
DCTH6000
±150mm
<±0.5/±0.25
666mm
183mm
852g
100g
15mm
16mm
DCTH8000
±200mm
<±0.5/±0.25
856mm
259mm
1.3kg
140g
29mm
27mm
CAPTIVE GUIDED CORE
RDP Electronics Ltd., DC LVDT Series DCTH
An RDP captive guided displacement transducer incorporates bearings to guide the armature inside the measurement sensor. Captive LVDTs are recommended for position measurement applications where guidance may be poor and end bearings may be required.
DCTH500C to DCTH18500C
A = 23.0mm
D1 = 20.6mm
TR = M5x0.8 / 11mm
TF = M5x0.8
Type
Range
Linearity error(% F.S.)
L
X
D3
Total weight
TF
Over-Travel
Inward over-travel
Outward over-travel
DCTH500C
±12.5mm
<±0.5/±0.25/±0.1
194mm
38mm
4.75mm
340g
15mm
10mm
12mm
DCTH1000C
±25mm
<±0.5/±0.25/±0.1
222mm
63mm
4.75mm
398g
15mm
13mm
10mm
DCTH2000C
±50.0mm
<±0.5/±0.25/±0.1
336mm
76mm
4.75mm
511g
15mm
10mm
14mm
DCTH3000C
±75mm
<±0.5/±0.25/±0.1
448mm
114mm
4.75mm
625g
15mm
24mm
15mm
DCTH4000C
±100mm
<±0.5/±0.25/±0.1
494mm
127mm
4.75mm
767g
15mm
8mm
14mm
DCTH6000C
±150mm
<±0.5/±0.25
684mm
178mm
4.75mm
1.0kg
15mm
12mm
17mm
DCTH8000C
±200mm
<±0.5/±0.25
875mm
254mm
4.75mm
1.4kg
32mm
22mm
25mm
DCTH10000C
±250mm
<±0.5/±0.25
1067mm
305mm
4.75mm
1.7kg
27mm
34mm
35mm
DCTH15000C
±375mm
<±0.5
1473mm
406mm
4.75mm
2.2kg
19mm
13mm
13mm
DCTH18500C
±470mm
<±0.5
1740mm
508mm
6.00mm
2.6kg
27mm
5mm
33mm
SPRING RETURN VERSION
RDP Electronics Ltd., DC LVDT Series DCTH
A 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.
