Gouy’s Method

(Digital Weighing Scale)

The Gouy's method involves measuring the force on the sample by a magnetic field and is dependent on the tendency of a sample to concentrate a magnetic field within itself.
The solid sample in the form of a long cylinder (area of cross section A) is hung from the pan of a balance and is placed such that one end of the sample is between the pole-pieces of the magnet (field H) and the other one is outside the field. The force exerted on the sample by the inhomogeneous magnetic field is obtained by measuring the apparent change ( m ) in the mass of the sample. The susceptibility χ is given By 2χ = 2 Δ mg/AH If the sample is in the form of powder, it is filled in a long nonmagnetic tube which is then suspended from the pan of the balance.

Features:

• Stackable DC Regulated Power Supplies with short circuit protection and safety Sockets.
• Power Supplies can be used as constant current and constant voltage source.
• Digital Gauss meter with 2k & 20k Gauss capacity and resolution 1 and 10 Gauss.
• High capacity Electromagnet up-to 20KG at 6mm Gap.
• High Precision Analogue Balance with resolution 0.1mg.
• Digital weighing scale with Readability 0.0001g.

Objectives:

• Calibration of magnetic field.
• To measure the magnetic susceptibility of a paramagnetic sample by measuring the force exerted on the sample by a magnetic field gradient.
• To demonstrate the diamagnetic behavior of glass rod.

Technical Data:

• Electro magnet : Pole Piece 75mm tapered to 25mm, Mag. Field 20kG at 6mm air gap, Energizing Coils Two of approx. 13W each.
• Scientific Balance : Capacity 200 g, Sensitivity 1/10 mg by vernier, Beam Hard Bronze/ Brass, Arrestment Circular, falling away type Air Damping Very quick and positive, beam coming to rest in 2-3 sec.
• Sample : Glass (rod), Aluminum (strip)
• Power Supply : 0-40V DC, 10A , 230V AC, 50 Hz, 3½ digit LED display, Ripple > 25mV, Overload Current limiting protection
• Digital Gauss meter : Range 2 kG & 20 kG, Resolution 1G & 10 G at 2 kG & 20kG, Power : 220 V, 50 Hz AC, InAs Hall probe
• Digital weighing scale : Capacity 50g, Readability 0.0001g, Repeatability (+/-) .1mg, Pan size 100mm, LCD with multi parameter display, RS232 interface.

Scope of Delivery:

• 1 DC Regulated Power supply (40V 10A)
• 1 Digital Gauge meter
• 1 High Field Electro magnet Setup
• 1 Analog weighing scale (SK204)
• 1 Digital weighing scale(SK204A)
• 1 Sample (glass & aluminum) Accessories
• 3 High Current Connecting lead (Red, Yellow & Black)
• 1 Set of balance weight
• 2 Power cord
• 1 Probe holder with cylindrical base
• 1 Table for analog balance