MIL-DTL-28827/1C
REQUIREMENTS:
Dimensions, configurations, and electrical schematic: See figure 1 and 2.
Weight: 2 ounces approximately
Calibration: See tables I, II, III, IV, and V.
Proof pressure: 3,000 psig.
Proof temperature: 100°F above the maximum increasing set point.
Time constant: Not to exceed 10 seconds in 75 centistokes, oil at 150 ft/min.
Electrical ratings:
Operating voltage: 28±5 V dc.
Current rating: .080 to 1.0 amps resistive.
Seal: Electrical chamber hermetic.
Media: MIL-PRF-6083
High temperature: (Ambient operating and non-operating): (+275°F).
Low temperature: (Ambient operating and non-operating): (-65°F).
Altitude: C(80,000 ft).
Shock: M(100 g's).
Vibration: S(test condition D, method 204 of MIL-STD-202).
Endurance: B(25,000 cycles).
Materials: All wetted materials shall be 300 series stainless steel. Non-wetted external parts shall be suitably
protected against corrosion.
Part or Identifying Number (PIN):
Note: Design limitations (actuation values and tolerances, deadband and deactuation values and tolerances)
should be coordinated with a manufacturer (s) listed on the QPL for this sheet before specifying a particular "M"
number. The fact that operating characteristics can be coded does not necessarily mean that it can be
manufactured or procured.
M28827/1-
A
C
D
A
B
Specification
Configuration
High temperature
High temperature
Low temperature
Low temperature
setting to within 2°F
setting to within 2°F
sheet number
and setting
setting to within
setting to within
20°F (see table
20°F (see table
code (see
and tolerance (see
and tolerance (see
table I)
II) or low end of
II) or low end
table III or table IV)
table III or table IV)
differential setting
differential setting
or high end
or high end
(see table V)
(see table V)
differential setting
differential setting
(see table V)
(see table V)
Example of PIN:
M28827/1-ACDAB identifies a switch of configuration 1 which actuates on increasing temperature at 146°F ± 5°F
and deactuates at 102°F ± 5°F.
3
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