| |
열유속
측정센서
PU-ATX
SERIES HEAT FLUX SENSOR (PU-ATX)
PU-ATX series, heat flux sensors and
specials
- The PU-ATX series of heat flux sensors consists
of a number of “standard” sensors with different diameters and
thicknesses.
- Apart from the standard models, special
models can be manufactured on demand.
- In most cases the use of the PU-ATX series is
associated with specific requirements concerning size (small or thin),
temperature (up to 250 degrees C), mounting (flexible), chemical resistance
(high) or the necessity to cover a large area.
- The PU-ATX series is designed and manufactured
by TNO-Science and Industry (former TNO-TPD).
-
INTRODUCTION
The PU-ATX series standard models consist of two
categories: the PU-ATX category of 3 mm thickness and the PU-ATX-T category of 1 mm
thickness.
-
- Unique features of the PU-ATX series
are:
-
-
record
breaking sensitivity per unit area
-
small sensors
available
-
flexibility
(for the PU-ATX-T category only)
The PU-ATX series is typically applied when one
or a combination of these features is a technical necessity, for instance
measurement of fluxes from human or animal bodies, or measurements on
cylindrical surfaces. The sensor body of the PU-ATX series is made out of cast
polyurethane.
In addition the PU-ATX manufafcturing technology
is applicable whenever very large sensors need to be manufactured.
MORE INFORMATION /
OPTIONS
In case the PU-ATX series specific
characteristics are not relevant, typically one should consider using the
“standard” LICHTZEN AE / AITNIX models HFP01 and HFP03.
Special models can be made according to
customer specification. Typical variables to be specified are:
-
size (can be very large)
-
area of sensitive part
-
thickness (1 mm or higher)
-
temperature / pressure range
-
chemical resistance
-
sensitivity
-
flexibility
-
heat flux range
-
IP protection class
In particular many special designs are made
of silicone. This material choice results in high temperature, chemically inert
and more flexible sensors. The mechanical robustness however is less than that
of polyurethane. In exceptional cases epoxies are used.
PU-ATX SERIES SPECIFICATIONS
- General: see tables below
- Optional temperature measurement: Pt100 or
thermocouple type K
- Optional use of silicone: temperature range
extended to 250 degrees C, improved chemical resistance. Typical minimum
thickness: 1.2 mm. Less stiff than PU-ATX. Type indication SI.
- Optional pressure resistance: to 110
bar
- Optional use of epoxy: to be resistant against
certain chemicals, however at lower flexibility. Type indication
EP.
- Optional calibration: determination of
temperature dependence.
- Manufacturing: TNO Science and Industry,
former TNO-TPD
Figure 1 Dimensions of PU-ATX
series, PU-ATX category of 3 mm thickness: sensitive area (1), guard (2), cable with miniplug (3), disconnectable
miniplug (male) on sensor (4), optional temperature sensor (5)
|
Model |
|
PU-ATX 11 |
PU-ATX 22 |
PU-ATX 32 |
PU-ATX 43 |
PU-ATX 54 |
|
Thickness |
mm |
3 |
3 |
3 |
3 |
3 |
|
Overall diameter |
mm |
25 |
50 |
75 |
100 |
150 |
|
Dimensions sensitive area |
mm2 |
10x10 |
20x20 |
25x25 |
30x30 |
50x50 |
|
Sensitivity (nominal) |
µV/Wm-2 |
20 |
50 |
50 |
170 |
300 |
|
Electrical resistance |
Ohm |
200 |
500 |
500 |
1500 |
3000 |
|
Filling material |
|
PU-ATX |
PU-ATX |
PU-ATX |
PU-ATX |
PU-ATX |
|
Temperature range |
° C |
-20 to +90 |
-20 to +90 |
-20 to +90 |
-20 to +90 |
-20 to +90 |
|
Thermal resistance |
m2K/W |
0.012 |
0.012 |
0.012 |
0.012 |
0.012 |
|
Expected accuracy |
% |
|
+5%/-5% @ 20 degrees C, temperature
dependence typically 0.17%/K |
|
|
Cable connection |
|
|
disconnectable miniplug
+ cable 2m |
|
|
Minimum bending radius |
mm |
|
infinite
|
|
The PU-ATX-T
series
-
-
- Figure 2 Dimensions of PU-ATX series , PU-ATX-T category of 1 mm
thickness: sensitive area (1), guard (2),
fixed wires (3), minimum bending radius (4), optional temperature sensor
(5)
- NOTE: PU-ATX-T sensors can be bent, but are quite
rigid. Installation typically
requires taping.
|
Model |
|
PU-ATX 11 T |
PU-ATX 22 T |
PU-ATX 32 T |
PU-ATX 43 T |
|
Thickness |
mm |
1 |
1 |
1 |
1 |
|
Overall diameter |
mm |
25 |
50 |
75 |
100 |
|
Dimensions sensitive area |
mm2 |
Ø 15 |
Ø 30 |
Ø 30 |
Ø 55 |
|
Sensitivity (nominal) |
µV/Wm-2 |
8 |
30 |
30 |
150 |
|
Electrical resistance |
Ohm |
400 |
1700 |
1700 |
7000 |
|
Filling material |
|
PU-ATX |
PU-ATX |
PU-ATX |
PU-ATX |
|
Temperature range |
° C |
-20 to +90 |
-20 to +90 |
-20 to +90 |
-20 to +90 |
|
Thermal resistance |
m2K/W |
0.004 |
0.004 |
0.004 |
0.004 |
|
Expected accuracy |
% |
+5%/-5% @ 20 degrees C,
temperature dependence typically 0.17%/K |
|
Cable connection |
|
|
fixed wires 2m |
|
|
|
Minimum bending radius |
mm |
15 |
25 |
40 |
50 |
-
|
