Hall Sensors Device

Bell Technologies Inc.,

1. Hall Sensors Device - Instrumentation Quality

2. Hall Sensors Device - Single Axis

3. Hall Sensors Device - Three Axis

4. Hall Sensors Device - High Linearity

Hall Sensors Device - High Linearity

Bulk Indium BH-900 Series
High Linearity

Bell Technologies Inc.,

Description
F.W. Bell 900 Series Hall Sensors are high-performance units
providing high linearity and broad field and temperatures ranges
for a wide variety of magnetic field measurements. All units in the
series are encapsulated in rugged, epoxy, sealed cases.

A room temperature linearity error curve from -30 to +30 kG is
supplied, indicating optimum operating conditions for each device.

The models 900 and 921 are not calibrated above 30 kG.

Models
a. BH-910 High Linearity
b. BH-921 Cryogenic Operation (1.5 to 350° k)
c. BH 921 & 900 Wide Dynamic Range

Hall Sensors Device - Three Axis

Bulk Indium Arsenide BH-703
Three Axis

Bell Technologies Inc.,

Description
The BH-703 multi-axis Hall sensor consists of three individual
Hall elements oriented in mutually perpendicular planes and
encapsulated in a small epoxy package. This enables the BH-703
to produce voltages proportional to the three orthogonal
components (Bx, By, Bz) of a magnetic flux in any direction.
Thus the BH-703 may be permanently mounted or arbitrarily
oriented to sense fields in any direction.

The magnitude of the flux vector, B, can be found using the following
relation:


Features
• Three Axis, simultaneous measurement
• Instrumentation Quality

Hall Sensors Device - Single Axis

Bulk Indium Arsenide BH-700 Series

Single Axis

Bell Technologies Inc.,

Description
Designed to meet the requirements of a wide range of magnetic
field measurement applications, the BH-700 Series are small,
solid-state devices that provide an output voltage proportional to
the product of control current and ambient flux density. Five
single-axis models are available to measure axial and transverse
magnetic field components with sensitivities from 7.5 to 50
mV/kG and input and output resistance of several ohms.

Electrical Specifications

BH-702
a. Air gap: between concentrator and substrate, 0.0025" nominal
and 0.003" maximum.

b. Sensitivity: Basic sensitivity of Hall element .15 V/A-kG min.
With the unit suspended in a free field of 100 oersteds and
Ic=200 mA, the open circuit Hall voltage is 8.0 mV min. In a
closed magnetic circuit with Ic=200 mA, VH is 3.mV/Ampere
turn min.

c. Polarity: With the magnetic field vector as shown and Ic entering
the red lead, the positive Hall voltage will appear at the blue lead.

BH-701
a. Linearity: VH vs. B, –10 to +10 kG: ±0.25% of reading, max.

BH-704
VH vs. B, –30 to +30 kG: ±1.0% of reading, max.
VH vs. Ic, 0 to 100 mA: ±0.1% of reading, max.
VH vs. Ic, 0 to 300 mA: ±1.0% of reading, max.

b. Encapsulation:
The BH-701 and the BH-704 are encapsulated in a rugged aluminum
oxide ceramic and epoxy case for excellent heat transfer and strength.

Models
1. BH-700 Low cost, Transverse, General Purpose
2. BH-701 Rugged, High-Linearity, Transverse, Instrumentation Quality
3. BH-702 Low Field (ferrite-embedded), Transverse
4. BH-704 Rugged, High Linearity, Axial, Instrumentation Quality
5. BH-705 General Purpose, Transverse