SENSTAR UltraWave E4FG0101, Product Manual

Site design

Page 6

UltraWave Product Guide

You can calculate the required minimum clearance between the beam centerline and an object by 
using the following formula:
(transmitter/receiver separation) X 0.02 = (min. distance between beam centerline and object)
The formula can also be used to calculate the maximum separation between the transmitter and 
receiver when you know the available clearance between the beam centerline and the nearest 
object:
(transmitter/receiver separation) = (min. distance between beam centerline and object) / 0.02

Zone length

The optimum length of each zone depends on several factors:

•

the required level of security 

•

physical constraints (terrain, trees, fences, buildings, etc.)

•

available space for the detection zone

For a 

high-security

zone

, the maximum zone length is 90 m (295 ft.) and the maximum distance 

between the transmitter and receiver is 100 m (328 ft.). The terrain must be level to grade ± 7.5 cm 
(3 in.) and the surface must be free of vegetation and either paved, or covered with a 10 cm (4 in.) 
layer of crushed stone (2 cm {0.75 in.} max.). 
For a 

medium-security

zone

, the maximum zone length is 140 m (459 ft.) and the maximum 

distance between the transmitter and receiver is 150 m (492 ft.). The terrain must be level to grade 
± 15 cm (6 in.) and the surface must be paved, or covered with crushed stone, or hard packed dirt 
or clay, or closely mowed grass.
For a 

low-security zone

, the maximum zone length is 200 m (656 ft.) and the maximum distance 

between the transmitter and receiver is 200 m. The terrain must be level to grade ± 23 cm (9 in.) 
and the surface must be paved, or covered with crushed stone, or hard packed dirt or clay, or 
closely mowed grass.

Zone height

The height of the microwave field is approximately equal to the minimum required clearance 
between the beam centerline and an object (see 

Table 1

) plus the unit mounting height 

(e.g., for a microwave pair with a unit separation of 75 m the zone height is approximately 
1.5 m + 0.47 m = 1.97 m or 6.46 ft.). For applications that require additional zone height it is 
possible to stack two, or three UltraWave units on one mounting post. 

Table 2

 provides 

approximate zone heights based on Height Calculator tool recommendations. 

Figure 3

 illustrates a 

triple stacked UltraWave configuration. Open the UCM Height Calculator tool and select Double 
Stack, or Triple Stack configuration. Enter the unit separation and the Height Calculator tool will 
provide the installation details. 

transmitter/receiver separation

min. required clearance 

(beam centerline to object)

midpoint zone width

30 m (98 ft.)

0.6 m (2 ft.)

1.2 m (4 ft.)

50 m (164 ft.)

1.0 m (3.3 ft.)

2.0 m (6.6 ft.)

75 m (246 ft.)

1.5 m (5 ft.)

3 m (10 ft.)

90 m (295 ft.)

1.8 m (6 ft.)

3.6 m (12 ft.)

100 m (328 ft.)

2.0 m (6.6 ft.)

4.0 m (13.2 ft.)

125 m (410 ft.)

2.5 m (8.2 ft.)

5.0 m (16.4 ft.)

150 m (492 ft.)

3.0 m (10 ft.)

6.0 m (19.7 ft.)

200 m (656 ft.)

4.0 m (13.2 ft.)

8.0 m (26.3 ft.)

Table 1 Unit separation/minimum clearance