Sensor Properties

The sensor properties are read-only data stored on each PLUX sensor. These properties are returned as Plux::Properties objects and their contents depend on the sensor class (returned in Plux::Sensor::clas). There are two types of sensor properties: characteristics and measurement/calibration data.

Characteristics

The sensor characteristics are design or specification data which does not change between different units of the same sensor model (i.e., same class, hardware version and variant if present). The tables below show the characteristics for each sensor class as returned by Plux::Sensor::characteristics.

EMG

Keyword	Description	Type	Unit / Value
lpFreq	Low-pass cut-off frequency	float	Hertz
hpFreq	High-pass cut-off frequency	float	Hertz
vGain	Voltage gain	float	V/V
variant	Electrode variant	Plux::String	"0" - Standard electrode contacts (snaps) "1" - Vaginal probe

ECG, EEG, GONI

Keyword	Description	Type	Unit / Value
lpFreq	Low-pass cut-off frequency	float	Hertz
hpFreq	High-pass cut-off frequency	float	Hertz
vGain	Voltage gain	float	V/V

EDA, BVP

Keyword	Description	Type	Unit / Value
lpFreq	Low-pass cut-off frequency	float	Hertz
hpFreq	High-pass cut-off frequency	float	Hertz
iGain	Current gain	float	dBI
vOffset	Voltage offset	float	Volt

RESP

Keyword	Description	Type	Unit / Value
lpFreq	Low-pass cut-off frequency	float	Hertz
hpFreq	High-pass cut-off frequency	float	Hertz
vGain	Voltage gain	float	V/V
variant	Sensor variant	Plux::String	"1" - Standard piezo "2" - Alternate piezo

LIGHT

Keyword	Description	Type	Unit / Value
wavelength	Peak sensitivity wavelength	float	nm
gamma	LDR gamma	float	-

XYZ

Keyword	Description	Type	Unit / Value
axis	Accelerometer axis	Plux::String	"x", "y", "z"
nAxes	Number of axes	int	3
bandwidth	Low-pass cut-off frequency	float	Hertz
maxPosAccel	Maximum positive acceleration	float	g
maxNegAccel	Maximum negative acceleration	float	g

FORCE

Keyword	Description	Type	Unit / Value
fsUnit	Full-scale unit	Plux::String	"kg", "g", "N", "lb"
fsVal	Full-scale value	float	Unit defined by fsUnit
valAtZero	Digital value at zero load and 16-bit resolution	int	-
valAtFs	Digital value at full-scale load and 16-bit resolution	int	-
variant	Load cell variant	Plux::String	"1" - FSR400 (Interlink) "2" - FSR402 (Interlink) "3" - FSR406 (Interlink) "4" - Flexiforce A201-100 (Tekscan) "5" - Vishai 0327 (550 lbs) "6" - Flintec BK2 (200 kg)

TEMP

Keyword	Description	Type	Unit / Value
variant	Sensor variant	Plux::String	"1" - MA100GG-103-A (General Electric)

VPROBE

Keyword	Description	Type	Unit / Value
variant	Sensor variant	Plux::String	"1" - Pelvexiser IQ (Pelvexiser)

OXIMETER

Keyword	Description	Type	Unit / Value
redWavelength	Red wavelength	float	nm
irWavelength	Infrared wavelength	float	nm
redDefCurrent	Red LED current default setting	int	-
irDefCurrent	Infrared LED current default setting	int	-
variant	Sensor variant	Plux::String	"F" - Finger "L" - Limb "H" - Head (fNIRS)

Measurement and Calibration data

Measurement data and calibration data are obtained on the automated production test of each sensor unit, being a report of sensor quality compliance. Additionally, calibration data can be used to improve the sensor transfer function on sensors with significant parameter dispersion from the specification values. The tables below show the data for the applicable sensor classes as returned by Plux::Sensor::measurCalib.

EMG, ECG

Keyword	Description	Type	Unit
lfVgain	Voltage gain at low out-band	float	dB
hpVgain	Voltage gain at high-pass pole	float	dB
bpVgain	Voltage gain at pass-band	float	dB
lpVgain	Voltage gain at low pass pole	float	dB
hfVgain	Voltage gain at high out-band	float	dB
bpCMRR	CMRR at pass-band	float	dB

XYZ

Keyword	Description	Type	Unit
restPosAccel	Digital value at +1g and 16-bit resolution	int	-
restNegAccel	Digital value at -1g and 16-bit resolution	int	-