Model	381	391
Range	Na: 0-100 ppm K: 0-100 ppm Ca: 15-100 ppm (Optional) Li: 10-100 ppm (Optional)	Serum Na: 0-200 meq/l K: 0-10 meq/l Ca: - Li: 0-2 meq/l (Optional)	Urine 0-200 meq/l 0-100 meq/l (Optional) 0-10 meq/l
Sensitivity	Na: 5 ppm K: 5 ppm Ca: 10 ppm (Optional) Li: 10 ppm (Optional)
Readout	2½ digit bright LED display	Dual 2½ digit bright red LED display
Accuracy	± 2% upto 40 ppm, ± 5% above 40 ppm	± 2% upto 100 meq ± 5% above 100 meq
Ignition System	In-built electronic Ignition by press of switch
Measurement System	One element at a time	2 elements on dual LED display
Repeatability	± 2 Counts
Detector	Silicon Photodiode
Filters	Narrow band interference glass filters
Nebulizer	Black backelite, axial flow type
Flame System	LPG & dry oil free air
Warm Up Time	10 minutes
Power	230 V± 10% AC, 50 Hz
Dimensions	375 x 245 x 220 mm (L x B x H) (Approx.)
Weight	Main Unit : 7.5 Kg. (Approx.) Compressor : 8 Kg (Approx.)
COMPRESSOR UNIT
Air Supply	By oil free mini compressor unit with pressure regulator
Combustion Gas LPG	Controlled by precision regulator
Power	230 V± 10% AC, 50 Hz
Dimensions	290 x 255 x 210 mm (L x B x H) (Approx.)
Weight	8 Kg (Approx.)