Sensors and Interfaces

Sensors & Interfaces

Stack provide a wide range of sensors and specialist interfaces to meet the vast majority of Motorsport requirements. We only offer sensors that have passed our rigorous testing program, and have proven suitable for Motorsport Applications.

Digital Sensors and Interfaces
These sensors and interfaces, used in conjunction with our “E” Input Expansion Modules, provide continuous analogue averaging of the input signal (no digital sampling whatsoever) over the sampling period (5mSec to 1 Second). This gives the following significant benefits over conventionally sampled analogue inputs:

Recorded/ displayed values are the true average value for the sampled period - there is zero sampling error
Inherently eliminate potential for aliasing errors
Enables slow recording rates for high frequency inputs without loss of information - e.g. Suspension movement, which has a typical frequency response of 1-2 kHz, can be recorded at 10Hz for measuring pitch and roll
Up to 15 bit resolution (0.003%) and <0.5% total error over the whole operating range of a sensor

Our range of digital sensors and sensor amplifiers include:

5mV to 20V differential input amplifiers
K-Type Thermocouple Interface
Absolute Pressure Sensors
50mm to 200mm Linear Displacement Transducers

Solid State 0-5 Volt Output Sensors
These sensors typically offer 1% accuracy - over their whole operating range - and are ideal for monitoring chassis and engine parameters where Digital Signal Processing is not required. The range of sensors includes:

0-3.5 bar, 0-10 bar, 0-100 bar Pressure Sensors
-30 to 150 deg C Temperature Sensors
50mm to 200mm Linear Displacement Sensors
+/- 5g Accelerometer

Automotive Sensors
We also supply a range of automotive spec. pressure, temperature and rotary displacement sensors suitable for measuring basic engine condition and driver inputs. This range includes:

0-2bar, 0-10 bar Pressure Sensors
-20 to 30 deg C, 0 to 150 deg C Temperature Sensors
120 degree, 360 degree Rotary Throttle & Steering Position Sensors

Specifications

Lap Timing System
	ST543	Infrared Lap Timing System receiver only
	ST544	Infrared Lap Timing System trackside beacon only
	ST546	Infrared Lap Timing System receiver & beacon
	ST918041	Master Beacon Decoder Key

Temperature Sensors
	ST663	-100C to +200C K-Type Thermocouple Amplifier with DSP Interface
	ST664	200-1200C 'K' Type Thermocouple Interface with DSP Interface
	ST464	200-1200C 'K' Type Thermocouple Interface with Low Freq DSP Interface (for use on Pulse Inputs)
	ST657	1 channel K-Type Thermocouple Interface 0-200°C 0-5V
	ST658	1 channel K-Type Thermocouple Interface 0-1100°C 0-5V
	ST659	4 channel K-Type Thermocouple Interface 0-1100°C 0-5V
	ST760*	150 ºC Fluid Temp. Sensor (1/8 BSPT)
	ST761*	Unavailable
	ST762*	150 ºC Fluid Temp. Sensor (M10)
	ST764*	300 ºF Fluid Temp. Sensor (1/8 NPTF)
	ST990	Air Temp Sensor
	ST991	-20 to 150 deg C temperature sensor (M6x1)

Pressure Sensors
	ST452-109	0-5 Bar Absolute Pressure Sensor with Low Freq DSP Interface (0.5% FS Total Error Band over -20C to +80C) Dash-3 Pressure Fitting (e.g. Boost)
	ST453	0-3.5 Bar Absolute Pressure Sensor with Low Freq DSP Interface (1.5% FS Total Error Band over -20C to +80C) 1/8NPT Pressure Fitting (e.g. Boost)
	ST740	0 to 3.5 bar/ 50 psi boost sensor (1/8"NPTF) (replacement only)
	ST741*	0-2 bar Fluid Pres. Sensor (M10)
	ST742*	0-30 psi Fluid Pressure Sensor(1/8 NPTF)
	ST744*	0-10 bar Fluid Pres. Sensor (M10)
	ST745*	0-150 psi Fluid Pres. Sensor (1/8 NPTF)
	ST746*	0-150 psi Fluid Pres. Sensor (1/8 BSPT)
	ST747-M10	10 bar/ 150 psi pressure sensor (M10)
	ST747-1/8NPTF	10 bar/ 150 psi pressure sensor (1/8 NPTF)
	ST747-1/8BSP	10 bar/ 150 psi pressure sensor (1/8 BSPT)
	ST749	Brake pressure sensor (1/8 NPTF)

Pulse Sensors
	ST492	Pulse Amplifier (e.g. Gearbox Sensor Amplifier)
	ST669	Magnetic Speed Sensor
	ST670	Proximity Speed Sensor

Displacement Sensors
	ST667	Linear Potentiometer with DSP Interface 150mm/6" (e.g. Suspension)
	ST672	Linear Potentiometer with DSP Interface 50mm/2" (e.g. Suspension)
	ST673	Linear Potentiometer with DSP Interface 100mm/4" (e.g. Suspension)
	ST674	Linear Potentiometer with DSP Interface 200mm/8" (e.g. Suspension)
	ST970	Rotary Potentiometer 120Deg (e.g.Throttle angle)
	ST970/483	Throttle Sensor (for spindle w/flat) with low frequency DSP Interface

	ST972	Linear Potentiometer 50mm/2" (e.g. Suspension)
	ST973	Linear Potentiometer 100mm/4" (e.g. Suspension)
	ST974	Linear Potentiometer 150mm/6" (e.g. Suspension)
	ST977	Linear Potentiometer 200mm/8" (e.g. Suspension)
	ST975	Not longer available
	ST976	300mm/20" String Potentiometer (0-5V output)
	ST983	300mm/20" String Potentiometer with DSP Interface

	ST978	Rotary Potentiometer 360Deg (e.g.Steering)
	ST979	Rotary Potentiometer Sensor 120Deg (e.g. pedal angle)
	ST979/483	Pedal Angle Sensor with low frequency DSP Interface

Force/Acceleration Sensors
	ST791	+/- 5g Accelerometer with 5Hz 5-pole Butterworth Low-pass Filter
	ST791/483	+/- 5g Accelerometer with with 5Hz 5-pole Butterworth Low-pass Filter & Low Freq DSP Interface

Voltage Sensors
	ST982	+/-1.0V Differential Voltage Interface with DSP Interface
	ST983	+/-5.0V Differential Voltage Interface with DSP Interface
	ST984	+/-20.0V Differential Voltage Interface with DSP Interface
	ST985	+/-5mV output Strain gauge amplifier with DSP Interface, 300 Ohm bridge
	ST986	+/-10mV output Strain gauge amplifier with DSP Interface, 300 Ohm bridge
	ST987	+/-20mV output Strain gauge amplifier with DSP Interface, 300 Ohm bridge
	ST988	+/-50mV output Strain gauge amplifier with DSP Interface, 300 Ohm bridge

Miscellaneous Sensors
	ST483	Low Freq DSP Interface to enable some 0-5Volt sensors to be connected into a digital input
	ST697	HT Ignition Pickup
	ST766	"K' Type Thermocouple Probe
	ST767	Rubbing Thermocouple Probe
	ST769	-20 to 150 deg C temperature sensor (M6x1)
	ST782	0-200C Infra-red Pyrometer ('K' Type Thermocouple output)
	ST995	5Hz GPS Receiver with NMEA Interface

Note: Sensors shown include products from Stack Test & Engineering range as well as Motorsport variants

Operating temperature range	-20ºC to +70ºC (extended range possible)
Mechanical size	151 (160 inc. connectors) x 76 x 20.5 mm
Finish	Hard black anodised aluminium
Weight	300g (approx.) without card
Operating voltage range	6.5 to 20 Volts DC
Reverse/Over-voltage protection	-60 Volts to +60 Volts DC
Power consumption	~3.0 Watts (~250 mA at 12 Volts DC)
Standby battery	Expected life > 5 year
Sealing	IP 67
Humidity	0-100% RH
Vibration	20g 50-2000Hz swept Sin. 12Hr x 3 axis
Radiated Emissions	EN55024B CISPR25
Radiated Immunity	50V/m
Conducted Immunity	DIN40839 Cat IV
Disk Interface	PCMCIA
Maximum address range	32 GB
Disk supply voltage	3.3 Volts
Disk format	IBM PC, FAT-32
File format	MPEG-2, Windows Media Player compatible
Video standards supported	PAL (625 lines), NTSC (525 lines), Composite & S-Video
Video frame rate	PAL 25fps, NTSC 30fps
Video input level	1 Vpp, 75 Ohm, ±10%
Video monitor output	1 Vpp, 75 Ohm, ±10% (includes on-screen display)
Power up to record time	< 2 seconds
Compression Format	MPEG-2
Quality ( /bitrate)	4 user selectable settings: Highest High, Medium, Low
Number of Audio channels	2
Input Level	Mic or Line Level. +3 to -30dBV (adjustable)
Input impedance	>10 K Ohm
Mic bias	3.3 V DC, 1 K Ohm
Audio monitor output	0 dBV (nominal)
Audio monitor output impedance	< 100 Ohm
Digital sampling: Full Res.	720 x 576 (PAL) / 720 x 480 (NTSC)
Digital sampling: Med. Res.	480 x 576 (PAL) / 480 x 480 (NTSC)
Digital sampling: Small Res.	352 x 576 (PAL) / 352 x 480 (NTSC)
Digital sampling: Smallest Res.	352 x 288 (PAL) / 352 x 240 (NTSC)
Record Time (min/GB) Full Res:	55(Highest) 39(High) 30(Medium) 24(Low)
Record Time (min/GB) MedRes:	70(Highest) 48(High) 37(Medium) 30(Low)
Record Time (min/GB) Small Res:	83(Highest) 60(High) 47(Medium) 39(Low)
Record Time (min/GB) Smallest Res:	111(Highest) 83(High) 66(Medium) 55(Low)

Frequently Asked Questions

If you haven't been able to find the information above then we can offer more help here in our FAQ section. If you are having trouble finding a solution then please contact your dealer who will be happy to assist you.

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