The SWS has the following detectors, all arranged in the direction
of the dispersion.
For the grating section:
- an array of 12 InSb detectors for the range 2.38-4.08 
m (Band 1),
- an array of 12 Si:Ga detectors for the range 4.08-13.16 m (Band 2),
- an array of 12 Si:As (BIBIB) detectors for the range 12.0-29.0 m (Band 3), and
- an array of 12 Ge:Be detectors for the range 28.9-45.2 m (Band 4).
For the Fabry-Pérot section:
- an array of 2 Si:Sb detectors for the range 11.4-26.0 m (Band 5), and
- an array of 2 Ge:Be detectors for the range 26.0-44.5 m (Band 6).
The InSb, the Si:As (BIBIB) and the Si:Ga detectors will be operated at
a temperature of 4-5 K;
the Si:Sb detectors for the F-P will be heated to 10 K (F-P); and
the Ge:Be detectors will be cooled by a thermal conductor to the 2 K
cryostat heat sink.
The detectors will be used with integrating pre-amplifiers with
non-destructive read-out, employing heated JFET's. The integrating
amplifiers have a read-noise of the order of 30 e 
. For more details
see chapter 5.