Spaceti

This document outlines the detection pattern of the Desk Occupancy Sensor and assists in determining the correct position relative to the table's edge, based on the table's height.

During sensor installation, the goal is to minimize false positive readings that can occur when someone passes close to the desk edge. This is achieved by selecting the appropriate distance from the edge of the table.

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Table 1 - detection pattern dimensions

Sensors need to be mounted according to the installation manual, ensuring the PIR lens is oriented in the specified direction.

If the detection pattern is blocked or partially obstructed by any obstacle on the underside of the desk, the range cannot be guaranteed.

- Sensors need to be mounted according to the installation manual, ensuring the PIR lens is oriented in the specified direction.
- If the detection pattern is blocked or partially obstructed by any obstacle on the underside of the desk, the range cannot be guaranteed.

This table shows the distance from the edge of the table at which the sensor detects movement, based on its height and position.

For regular sitting desks with a height of 70-80 centimeters, we recommend placing the sensor 15-30 centimeters from the edge of the desk.

For standing desks with a height of 110-130 centimeters, we recommend placing the sensor further away, 40-60 centimeters from the edge, to reduce the detection range in a standing position and minimize false positives.

- For regular sitting desks with a height of 70-80 centimeters, we recommend placing the sensor 15-30 centimeters from the edge of the desk.
- For standing desks with a height of 110-130 centimeters, we recommend placing the sensor further away, 40-60 centimeters from the edge, to reduce the detection range in a standing position and minimize false positives.

Table 2 - Range of the detection l’ [cm] from the edge of the desk based on height and sensor position (h and p [cm])

Green – Ideal mounting height and sensor position relative to the edge of the desk.

Yellow – Acceptable mounting height and sensor position, though it may occasionally cause false positives due to a longer detection pattern. When the sensor is positioned 50 to 60 cm from the desk edge, there is a possibility of false positives caused by movement on the opposite side of the desk, depending on desk placement.

Red – Most likely to cause false positives due to a very long detection pattern.

h	l	r
50	75	9
55	83	10
60	90	11
65	98	12
70	105	13
75	113	14
80	120	15
85	128	16
90	136	17
95	143	17
100	151	18
105	158	19
110	166	20
115	173	21
120	181	22
125	188	23
130	196	24
135	203	25
140	211	26

h [cm]	Mounting height of the sensor
l [cm]	Range of detection in front of the sensor
l’ [cm]	Range of detection from the edge of the desk
r [cm]	Range of detection behind the sensor
p [cm]	Distance of the sensor from the edge of the desk

	p=10	p=20	p=30	p=40	p=50	p=60
h=50	65	55	45	35	25	15
h=55	73	63	53	43	33	23
h=60	80	70	60	50	40	30
h=65	88	78	68	58	48	38
h=70	95	85	75	65	55	45
h=75	103	93	83	73	63	53
h=80	110	100	90	80	70	60
h=85	118	108	98	88	78	68
h=90	126	116	106	96	86	76
h=95	133	123	113	103	93	83
h=100	141	131	121	111	101	91
h=105	148	138	128	118	108	98
h=110	156	146	136	126	116	106
h=115	163	153	143	133	123	113
h=120	171	161	151	141	131	121
h=125	178	168	158	148	138	128
h=130	186	176	166	156	146	136
h=135	193	183	173	163	153	143
h=140	201	191	181	171	161	151

Figure 1 - Detection Diagram

Table 1 - detection pattern dimensions

Definitions:

Mounting Recommendation

Table 2 - Range of the detection l’ [cm] from the edge of the desk based on height and sensor position (h and p [cm])