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Instruction Sheet

012-09835B

Light Sensor

PS-2106A

.

*See the PASCO catalog or the PASCO web site at www.pasco.com 
for more information.

Introduction

The PS-2106A Light Sensor measures illuminance in units 
of lux. Illuminance is a measure of how much the incident 
light illuminates a surface, and is the total luminous flux per 
unit area. The lux is a lumen per square meter. The lumen 
(Systeme International (SI) unit) is defined in relation to the 
candela, one of the SI base units.

The sensor is designed to work with a PASPORT-compatible 
interface (such as the UI-5100 850 Universal Interface) and 
PASCO data acquisition software (such as PASCO Cap-
stone) to measure illuminance. 

The sensor includes a sensor mounting stud that can be 
screwed into the threaded hole on the side of the sensor. The 
sensor mounting stud can then be attached to a support rod 
using a clamp.

The Light Sensor has a three ranges which are represented 
by the icons next to the range select buttons. The candle 
range is 0 to 2.6 lux, the light bulb range is 0 to 260 lux, and 
the sun range is 0 to 26,000 lux.

Setup the Light Sensor

Plug the sensor into one of the PASPORT input ports of 
a PASCO PASPORT-compatible interface.

NOTE: If more distance is needed between the sensor and 
the interface, plug the sensor into the included Sensor Exten-
sion Cable, and then plug the cable into the interface. 

Start the PASCO data acquisition software. 

Using PASCO Capstone Software

Click the “Hardware Setup” icon in the Tools palette to 
open the “Hardware Setup” panel. Confirm that the 
Light Sensor icon appears with the interface’s icon. 

Light 

Port

Threaded Hole

Range Select 

Buttons

Included Items

Light Sensor

Sensor Mounting Stud

Required Items*

PASCO Interface

PASCO Data Acquisition Software

Recommended Item*

Sensor Extension Cable (PS-2500)

Sensor

PASPORT 

Input Port

Interface

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