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Scientific Instrumentation

A wide range of precision and ultra-precision resistors from Alpha Electronics, General Resistance and Susumu, power resistors from Caddock and current sensing resistors and shunts from Isabellenhütte in a variety surface-mount and through-hole packages and virtually any resistance value.

Variety of NTC and PTC thermistors, thermal probes and inrush current limiters from Ametherm.

A range of digital isolators from NVE Corporation, based on their patented spintronic GMR technology.

Scientific Instrumentation

Caddock MG Standard Range

Cylindrical high voltage axial leaded resistor
Maximum operating voltage from 600V up to 30kV *
Resistance values from 200Ω up to 2GΩ *
Tolerances of ±0.1%, ±0.25%, ±0.5% and ±1%
TCR as tight as ±80 ppm/°C from -15°C to +105°C
Maximum power rating from 0.5W up to 15W *
Operating Temperature Range of -55°C to +225°C

_{* Dependant on selected resistor model}

Caddock MG Series

Caddock TF020 Series

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 300V
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TF020 Series

Caddock TF050 Series

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 1.4kV
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TF050 Series

Caddock TF626 Series

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 300V
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TF626 Series

Caddock TF656 Series

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 1.4kV
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TF656 Series

Caddock TG Series

Precision high voltage axial leaded through-hole resistor
Resistance range: 25 kΩ to 1,000 MΩ
Temperature coefficient: ±25 ppm/°C from -55°C to +125°C
Load life stability: 0.25% per 1,000 hours at +125°C
Resistance tolerance options: ±0.1%, ±0.25%, ±0.5%, ±1%
Maximum continuous operating voltage up to 30 kV
-15 series increases maximum voltage by 60%

Caddock TG Series

Caddock USF240 Series

Ultra-stable radial leaded film through-hole resistors
Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
Maximum working voltage of 300V
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF240 Series

Caddock USF270 Series

Ultra-stable radial leaded film through-hole resistors
Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
Maximum working voltage of 1.4kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF270 Series

Caddock USF271 Series

Ultra-stable radial leaded film through-hole resistors
Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
Maximum working voltage of 2.5kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF271 Series

Caddock USF340 Series

Ultra-stable radial leaded film through-hole resistors
Maximum working voltage of 300V
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF340 Series

Caddock USF370 Series

Ultra-stable radial leaded film through-hole resistors
Maximum working voltage of 1.4kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF370 Series

Caddock USF371 Series

Ultra-stable radial leaded film through-hole resistors
Maximum working voltage of 2.5kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF371 Series

Caddock USFS Series

Ultra-stable radial leaded film through-hole resistor sets
Sets are available with either 3 or 5 selected USF300 series resistors (model dependent)
Voltage coefficient as low as 0.005 ppm/V per resistor set (model dependent)
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in 30MΩ, 50MΩ and 100MΩ sets
Multiple USFS selected resistor sets can be used in series to achieve higher total resistances and higher voltage ratings

Caddock USFS Series

Core Sensors CS15 Series

Non-Clogging submersible pressure transducer
Pressure ranges from 2 PSI to 50 PSI
Flush diaphragm prevents clogging
Hastelloy C276 diaphragm material
IP68 rated
Operating temperature of -40 to +85°C
Compensated temperatures from 0 to +55°C

Core Sensors CS15

Core Sensors CS20 Series

Industrial temperature transmitter
RTD sensor type, PT100, Class B
Media temperature range of -40°C up to +200°C *
Operating temperature range of -40°C up to +85°C
Total error at RT & FS of ≤±1%
Maximum pressure of 5,000 PSI
Amplified 4-20mA or 1-5V output signal

Core Sensors CS20

Core Sensors CS50 Series

Non-incendive pressure transducer
Pressure ranges from 50 PSI to 30,000 PSI
Accuracy of ≤±0.25% BFSL at 25°C
Stability of ≤±0.25% of FS
Pressure cycles of 100 million
Overpressure of 2x minimum
Burst pressure of 5x or 60,000 PSI

Core Sensors CS50

Caddock MG Standard Range

Precision High Voltage Resistors

Cylindrical high voltage axial leaded resistor
Maximum operating voltage from 600V up to 30kV *
Resistance values from 200Ω up to 2GΩ *
Tolerances of ±0.1%, ±0.25%, ±0.5% and ±1%
TCR as tight as ±80 ppm/°C from -15°C to +105°C
Maximum power rating from 0.5W up to 15W *
Operating Temperature Range of -55°C to +225°C

_{* Dependant on selected resistor model}

Caddock TF020 Series

Low TC Ultra-Precision Film Resistors

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 300V
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TF050 Series

Low TC Ultra-Precision Film Resistors

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 1.4kV
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TF626 Series

Low TC Ultra-Precision Film Resistors

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 300V
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TF656 Series

Low TC Ultra-Precision Film Resistors

Ultra-precision film through-hole resistor
Radial or axial leaded variants available
Maximum working voltage of 1.4kV
Constructed with Caddock’s Tetrinox® resistance films
Long term stability to 0.01% per 1,000 hours
Storage temperature range from -55°C up to +105°C

Caddock TG Series

Low TC Precision High Voltage Resistors

Precision high voltage axial leaded through-hole resistor
Resistance range: 25 kΩ to 1,000 MΩ
Temperature coefficient: ±25 ppm/°C from -55°C to +125°C
Load life stability: 0.25% per 1,000 hours at +125°C
Resistance tolerance options: ±0.1%, ±0.25%, ±0.5%, ±1%
Maximum continuous operating voltage up to 30 kV
-15 series increases maximum voltage by 60%

Caddock USF240 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors

Ultra-stable radial leaded film through-hole resistors
Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
Maximum working voltage of 300V
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF270 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors

Ultra-stable radial leaded film through-hole resistors
Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
Maximum working voltage of 1.4kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF271 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors

Ultra-stable radial leaded film through-hole resistors
Constructed with two selected USF300 series resistors bonded back to back for parallel connection on the PCB
Maximum working voltage of 2.5kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF340 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors

Ultra-stable radial leaded film through-hole resistors
Maximum working voltage of 300V
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF370 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors

Ultra-stable radial leaded film through-hole resistors
Maximum working voltage of 1.4kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USF371 Series

Ultra-Stable Low TC Ultra-Precision Film Resistors

Ultra-stable radial leaded film through-hole resistors
Maximum working voltage of 2.5kV
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in standard resistance values most commonly used in precision analog design
Zero nominal TCR
Temperature range from -40°C up to +85°C

Caddock USFS Series

Ultra-Stable Low TC Ultra-Precision Film Resistors

Ultra-stable radial leaded film through-hole resistor sets
Sets are available with either 3 or 5 selected USF300 series resistors (model dependent)
Voltage coefficient as low as 0.005 ppm/V per resistor set (model dependent)
Ceramic package provides cool operation
Utilising Caddock’s proprietary resistance film systems
Available in 30MΩ, 50MΩ and 100MΩ sets
Multiple USFS selected resistor sets can be used in series to achieve higher total resistances and higher voltage ratings

Core Sensors CS15 Series

Non-Clogging Submersible Pressure Transducer

Non-Clogging submersible pressure transducer
Pressure ranges from 2 PSI to 50 PSI
Flush diaphragm prevents clogging
Hastelloy C276 diaphragm material
IP68 rated
Operating temperature of -40 to +85°C
Compensated temperatures from 0 to +55°C

Core Sensors CS20 Series

RTD Temperature Transmitter

Industrial temperature transmitter
RTD sensor type, PT100, Class B
Media temperature range of -40°C up to +200°C *
Operating temperature range of -40°C up to +85°C
Total error at RT & FS of ≤±1%
Maximum pressure of 5,000 PSI
Amplified 4-20mA or 1-5V output signal

Core Sensors CS50 Series

Non-Incendive Pressure Transducer

Non-incendive pressure transducer
Pressure ranges from 50 PSI to 30,000 PSI
Accuracy of ≤±0.25% BFSL at 25°C
Stability of ≤±0.25% of FS
Pressure cycles of 100 million
Overpressure of 2x minimum
Burst pressure of 5x or 60,000 PSI

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