Gardco PG-1, User Manual

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1. The PocketGoniometer model PG-1 
 

is a battery operated instrument for laboratory and field 
applications related to gluing, printing and surface problems. It 
is an ideal tool to reveal contamination of a specimen as well as 
the effect of cleaning and surface treatments. A magnified 
image of the droplet is displayed on the built-in screen 
equipped with an adjustable protractor. An integral eyepiece 
provides additional magnification for improved accuracy.  
 
This model is ideal for introduction of the “static” contact angle 
concept. The contact angle approach is a robust method, 
established long time ago. By placing a liquid droplet on a 
specimen surface a contact angle 

θθθθ

 is formed at the contact 

area. By definition, a droplet which “beads up”, is non-wetting 
and a contact angle higher than 90 degrees is 
displayed. When the droplet “wets out” across the 
surface, wetting is obtained and the contact angle is 
less than 90 degrees. 

 
Applicable Standards:

TAPPI T458, ASTM D724, ASTM D5946, SCAN –P 18 

1.1   Unpacking your instrument 

 
The 

Pocket

Goniometer is delivered in a case including 

- a Removable eyepiece 
- a Training Tool with three semi-spheres (86º, 77º, 61º) 
- a Carrier Strip kit with Special Tape (50pcs) 
- an Accessory Kit 

PG Instrument 

Training Tool 
Carrier Strip 
Special Tape

Accessory Kit 
Removable eyepiece 

Fig 1.2 PG-1 Instrument case and accessories 

Fig. 1.1 The contact angle 

Liquid droplet 

θθθθ

> 90°

Fig. 1.3 PG-1 Accessory Kit 

Applicator Tubing 

 (PN# 860 314)

Tubing Dispenser 

(PN# 860 331)