Models; Models 4200 And 4200L; Figure 2: Model 4200 Vibrating Wire Strain Gauge; Figure 3: Model 4200L Vibrating Wire Strain Gauge - Geokon 4200 Series Instruction Manual

2 | MODELS | GEOKON
2.

MODELS

vibrating wire strain gauges come in a variety of models, all easily
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identifiable by the color of heat shrink which covers the protective tubes, as
shown in the table below.*
Model
4200 (4,000 
4200L
4200 6 (5,000 
4200 7 (10,000 
4200X
*Applicable only to products manufactured after September 2016.

TABLE 1: Heat Shrink Color Designations

The following sections describe in brief the various embedment strain gauges
available from .
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2.1 MODELS 4200 AND 4200L

Models 4200 and 4200L are designed primarily for long-term strain
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measurements inside mass concrete, in structures such as foundations, piles,
bridges, dams, containment vessels, tunnel liners, etc.
The 4200L is a low-modulus version designed to enable early curing strains to
be measured. The length of the 4200 gauge is 152 mm (6").

FIGURE 2: Model 4200 Vibrating Wire Strain Gauge

FIGURE 3: Model 4200L Vibrating Wire Strain Gauge

Heat Shrink Color
Blue
Black
Red
Green
Yellow (dependent on the reason for the X designation)