Model 4121 BIRNS Chamber Light Technical Specifications

  • Superior thermal design: allows higher-output lamps (up to 50w)
  • Complete Safety: Dual helium release methods; case ground (earth)
  • Versatility: options include four lenses and various lamps
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  PHYSICAL
Length:
76 mm (3.0 in.)
Diameter of body:
Ø76 mm (Ø3.0 in.)
Diameter of base:
Ø114 mm (Ø4.5 in.)
Mounting holes:
2 x Ø6.4 mm (Ø.25 in.) holes on Ø97 mm (Ø3.82 in.) bolt circle
Weight in Air:
450 g (1.0 lb)

LIGHTING/PHOTOMETRIC
Lamp Type:
Incandescent Tungsten-halogen MR-16 (Parabolic Aluminized Reflector)
Time To Full Brightness:
<1 second after application of power
Operating Position:
Universal (i.e. any position)
Light Output:
895 initial lumens, depending on installed lamp
Dimming Range:
0-100%
Correlated Color Temp.:
3,050 K, depending on installed lamp

ENVIRONMENTAL
Protection Level:
IP 68
Depth Rating:
300 M (1,000 FSW)

ELECTRICAL
Input Voltage:
12 or 24 VAC/VDC (standard), depending on installed lamp
Lamp wattage:
20 or 50 VAC/VDC (standard), depending on installed lamp
Supply Frequency:
60 Hz standard; 50 Hz OK
Cable Size:
16 AWG type SO, 3 conductor (standard)
Cable Current Rating:
12 amperes maximum
Cable Voltage Rating:
600 volts maximum
Ground (Earth) wire size:
16 AWG; case ground to housing

MATERIALS
All Housing Parts:
6061 Aluminum, hard black anodized per MIL-A-8625, Type III, Class 2
Wave washer:
Spring steel, plated
Lens:
Tempered Borosilicate glass
Lens Gasket:
Silicone
O-ring seals:
Nitrile (Buna N), compound N674-70
Connector:
Glass-reinforced epoxy (GRE)
Connector Pins:
Brass 360 per ASTM B16, gold-plated per MIL-G-45204

1 Substantive input voltage variation will affect lamp performance characteristics, including light output, lamp life, consumed power, color temperature, etc. Generally, higher voltage use will increase light output, power, and color temperature and will lessen lamp life, and lower voltages will have converse effects. However, the relationships are linear only near the rated input voltage value.