MIL-HDBK-1003/7
Table 23
Sensing Elements for Controls and Instruments (cont.)
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*
*
Common Applications
* Element
*
Type
Control
Instrument
*
*
*
* Temper- Elec resistance Copper
Temperature
Potentiometer
* ature
*
of metals
regulators
40 to 250 deg. F
*
*
Nickel
300 to 600 deg. F
*
300 to 1800 deg. F *
Platinum
*
850 to 5200 deg. F *
Optical
Comparative
*
*
pyrometer
rad energy
*
*
Radiant
Flame safeguard
Potentiometer
200 to 7000 deg. F *
*
pyrometer
energy on Surf. temp.
*
*
thermo-
regulation
*
*
couples
*
*
Fusion
Pyrometric Cones
*
1600 to 3600 deg. F *
*
*
Crayons
*
*
100 to 800 deg. F
* Pressure Mechanical
*
Bourdon
Pressure, draft
Pressure gauge
*
*
tube
and vacuum
*
Bellows or vacuum regulators Low pressure, draft *
*
and vacuum gauges, *
diaphragm
*
*
Barometer
*
*
Variable
Pressure
Process pressure
Potentiometer:
*
100 - 50,000 p.s.i. *
electric
transducer regulator
*
*
resistance due
*
*
to strain
*
*
Variable
Thermo-
Vacuum regulator
High vacuum
*
*
electric
couple
1-700 microns Hg.
*
*
resistance due
*
*
to vacuum
*
*
Variable
Vacuum
Vacuum regulator
High vacuum
*
*
electronic
tube
down to
*
*
resistance to
0.1 micron Hg.
*
*
vacuum
*
*
Variable
Capaci-
Pressure
Indicators and
*
recorders - 1" H2O *
tance
regulators
*
*
to 1,200 psig
*
*
Variable
Frequency Pressure
Indicators and
recorders - 1" H2O *
*
transducer regulators
*
*
to 1,200 psig
*
*
* Level
*
Visual
Gauge stick,
*
*
Transparent tube
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