NF01
Needle
type Heat Flux and temperature Sensor
The NF01 needle type heat flux and temperature sensor
is used to perform continuous measurement of temperature and heat fluxes in
furnace walls. It is designed in particular as a tool for monitoring blast
furnaces and smelters. The same technology can be used to manufacture heat flux
sensors for different applications.
- Figure 1 Needle type heat flux (and
temperature) sensors applied as monitoring tool for blast furnace conditions
(1), (2), and (3): Removable high temperature heat flux sensor type HF01(4),
measurement and control system (5), alarm / warning system (6), steel shell
(water cooled) (7), graphite (also applicable in brick) (8), mortar (9),
semi-graphite (10).
- The sensors are part of furnace /
smelter monitoring systems and can be used to study energy balances as well as
on-line (continuous) detection of failures in water cooling failure or of
process overheating.
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INTRODUCTION
- The NF01 has been designed for studies
of the energy balance of industrial blast furnaces and smelters. It has been
applied successfully in iron furnace safety systems as well as in a smelter
for titania slag production
- The main component, the actual sensor,
is incorporated in a fully stainless steel needle.
- This sensor can withstand temperatures
up to 700 degrees C, as well as the aggressive chemical environment of a
furnace. Optionally the sensor temperature can be extended to 1000 degrees C.
- The extension cable is made of PVC.
- Sensor output consists of a heat flux
signal (microvolt analog signal) and type K thermocouple.
- NF sensors can be manufactured in such
a way that they are fully exchangeable, which is easy for servicing. Also the
exact depth of insertion is not critical, which saves installation time.
-
SUGGESTED USE
- Studies
of energy balance of furnaces.
- Safety
systems of blast furnaces.
- Monitoring
of smelters.
-
-
Figure 2 NF01-4mm version for operation
in the water cooled part (shell) of the furnace wall.
Steel shell(2), water cooling (3), graphite or brick (1), Coupling screwed part (4), PVC
cable (5), heat flux and temperature sensor (6), coupling welded part (8).
Figure 3 NF01-8mm version for operation
in the graphite part of the furnace wall. Steel
shell(2) , water cooling (3), graphite or brick (1), Coupling screwed part(4), PVC cable
(5), heat flux and temperature sensor (6), coupling welded part (8).
MORE INFORMATION /
OPTIONS
- Alternative designs:
Hukseflux is specialised in heat flux
sensor design. For different applications special models can be constructed.
- Optional:
NF01 can be made in different diameters and
lengths (see below). Extended temperature to 1000 degrees C.
- See model NF02 for miniaturised versions
of NF01.
- See NAM01 and AC100 amplifiers for
amplification.
-
Added items:
- NF01 coupling -W, coupling welded part, specify length
- NF01 coupling -S, coupling screwed part
- NF01-BIT, bits for drilling/centering order depentent
- NF01-DRILL, drills order dependent
NF01 SPECIFICATIONS
-
Sensitivity (nominal): depends on exact
design
-
Temperature dependence: depends on exact
design
-
Working range (typical): 0.05 to 50 kWm-2
-
Temperature range
sensor: -30 to +1000 °C
-
Temperature range
cable:-30 to +105 °C
-
Heat flux output
signal: analog microvolts
-
Temperature output
signal: thermocouple type K
-
Power requirements: no
power required
-
Optional: sensor length
and diameter, extended cable, cables with alternative colour codes
-
Protection
sensor/coupling/cable: IP 65 / 64 / 64
-
CE certification: NF01 is CE certified
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