Food, General IR Spectroscopy & Oil Monitoring Sensors
QDC Pyroelectric Infrared Food, General IR
Spectroscopy & Oil Monitoring Sensors, Analog
Overview
KEMET’s QDC thin film pyroelectric food sensors can be
reduced in physical size and still provide high sensitivity
with fast frequency operation, enabling this highly stable 2
element sensor in a TO39 package.
The sensor element is built into a low noise circuit that
has an internal CMOS operational amplifier with a 10 GΩ
feedback resistor outputting a voltage signal centered
around half the supply rail.
For additional sources of information, please refer to the
Environmental Sensors page on KEMET.com
Applications
• Food (nutritional value, adulteration, decay)
• Breath (medical, automotive, consumer)
Benefits
• Fast, stable response over a wide operating frequency range
• 2 sensor elements in one package
• TO39 package
• Analog output
• Integrated operational amplifier
Ordering Information
USE
Product Family
Sensors
QDC
Series
QDC = TO39 IR
Food, General
IR Spectroscopy
and Oil
Monitoring
Sensors
D
Sensor Type
D = Dual
A
Mounting Type
A = Sensor only
FAT1
Specification
FAT1 = Fat
LAC1 = Lactose
PAL1 = Protein and Lactose
PRT1 = Protein
SUG1 = Sugar, Ethanol
0
Packaging
0 = Bulk
0
Version
0
Built Into Tomorrow
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
SE0215_QDC • 12/16/2022
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Food, General IR Spectroscopy & Oil Monitoring Sensors
QDC Pyroelectric Infrared Food, General IR Spectroscopy & Oil Monitoring Sensors, Analog
Environmental Compliance
All KEMET Food Sensors are RoHS and REACH Compliant.
Article 33(1) of the REACH Regulation states that manufacturers and importers of articles (products) are required to notify
their customers of the presence of any Substances of Very High Concern (SVHC) in their products exceeding 0.1% by weight
and provide instructions on safe use of the product.
KEMET Corporation reports regarding the Article 33(1) of REACH Regulation as follows:
1. Applicable Product: Food Sensors (QFC & QFS series)
2. Report for the content of REACH SVHC list:
The product(s) above contains a substance by more than 0.1wt% per product weight that was published in the 8th update of
the REACH SVHC substances (December 19, 2012).
3. Regarding the safety of the food sensors (Piezoceramic products):
The Piezoceramic that is used in this product becomes ceramic by sintering powder containing PZT as the main ingredient. It
is chemically stable, with minimum risks toward the human body or environment within the intended use of the product. Please
note that risks could occur in the case of inhalation or accidental oral uptake of powder ceramics.
4. Technical product information on the food sensors (Piezoceramic products):
The manufacturing technique of the “piezoceramic products” whose main ingredient is Lead Titanium Zirconium Oxide (PZT)
has been established, and there is no alternative material that can exhibit superior performance than PZT at this moment.
Please note that the piezoceramic is listed as an exempt on RoHS (2011/65/EU) AnnexIII (7c.1).
5. The responsibility of piezoceramic manufacturers:
Piezoceramic manufacturers report information regarding PZT containment in their products to the customers to obey the
article 33 of the REACH regulation.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
SE0215_QDC • 12/16/2022
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Food, General IR Spectroscopy & Oil Monitoring Sensors
QDC Pyroelectric Infrared Food, General IR Spectroscopy & Oil Monitoring Sensors, Analog
Dimensions – Millimeters
Cross Section View
Top View
Bottom View
Performance Characteristics
Frequency Characteristics
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
SE0215_QDC • 12/16/2022
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Food, General IR Spectroscopy & Oil Monitoring Sensors
QDC Pyroelectric Infrared Food, General IR Spectroscopy & Oil Monitoring Sensors, Analog
Part Number Specifications
Sensor Characteristics
Filter Aperture
Element Size
(mm)
(µm)
2.6 x 2.6
1
Package
TO39
Responsivity
1
(V/W)
150,000
D*
1
(cm√Hz/W)
3.5 x 10
8
Noise
1
(µV√Hz)
Mean 70
1,000 x 1,000
10 Hz, 500 K, room temperature, without window and optics.
Electrical Characteristics
Maximum
Voltage
1
(V)
8
1
Minimum
Voltage (V)
2.7
Microphonics
(μV/√Hz)
at 10 Hz
S
vib
~2
Time Constant
(ms)
~12
Operating
Temperature
Range (°C)
−40 to +85
Storage
Temperature
Range (°C)
−40 to +110
Absolute maximum operating voltage.
Output voltage normalised around mid-rail.
Operational amplifier with 10 GΩ feedback resistor.
Part Number
Part Number
USEQDCDAFAT100
USEQDCDALAC100
USEQDCDAPAL100
USEQDCDAPRT100
USEQDCDASUG100
USEQGCCAC82L00
1
USEQGCDAC82L00
1
USEQGCDAC82M00
1
USEQGCDAC82100
1
USEQGCCAC82N00
1
USEQGCDAC82N00
1
USEQGCCAC82S00
1
USEQGCDAC82S00
1
USEQGCCA50L100
1
USEQGCDA50L100
1
USEQGCDASF6100
1
1
Filter - CWL µm/(HPB nm)
Channel 1
Fat Reference - 5.60/(80)
Lactose Reference - 7.70/(140)
Protein - 6.46/(130)
Protein Reference - 6.70/(120)
Reference - 5.0 Long Pass
CO
2
- 4.26/(180)
Reference - 3.91/(90)
Reference - 3.70/(110)
Reference - 4.90/(130)
CO
2
- 4.30/(110)
Reference - 3.91/(90)
CO
2
- 4.43/(60)
Reference - 3.91/(90)
Broadband - 5.0 Long Pass
Broadband - 5.0 Long Pass
Reference - 3.91/(90)
Channel 2
Fat - 5.73/(80)
Lactose - 9.61/(150)
Lactose - 9.61/(150)
Protein - 6.46/(130)
Sugar, Ethanol - 9.50/(400)
–
CO
2
- 4.26/(180)
CO
2
- 4.26/(180)
CO
2
- 4.26/(180)
–
CO
2
- 4.30/(110)
–
CO
2
- 4.43/(60)
–
Broadband - 5.0 Long Pass
SF
6
, Ethylene - 10.6/(240)
Use
Fat
Lactose
Protein and Lactose
Protein
Sugar, Ethanol
CO
2
CO
2
CO
2
(Medical)
CO
2
(Medical)
CO
2
(Narrow)
Weight
(gr)
0.97
0.97
0.97
0.97
0.97
0.93
0.97
0.97
0.97
0.93
0.97
0.93
0.97
0.93
0.97
0.97
CO
2
(Narrow)
CO
2
(Special)
CO
2
(Special)
Broadband for bespoke filters
Broadband for bespoke filters
SF
6
, Ethylene
From the QGC Gas Sensors series, used for gas and gas flues analysis.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
SE0215_QDC • 12/16/2022
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Food, General IR Spectroscopy & Oil Monitoring Sensors
QDC Pyroelectric Infrared Food, General IR Spectroscopy & Oil Monitoring Sensors, Analog
Part Schematic
Internal Schematics
Sensor
Ch 1
Sensor
+V
Ch 2
Gnd
V+ /2
Recommended Circuit Diagram
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
SE0215_QDC • 12/16/2022
5
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