Scientific Instrumentation

Scientific Instrumentation

Our range for Scientific instrumentation includes:

  • 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
Show:
Sort By:

Alpha MU Series

The MU ultra-precision resistor 1-2-3 network series from Alpha Electronics offers a 3 terminal, 2 element resistor network in a small surface-mount package. Each resistive element can range from 10Ω up to 20kΩ all with tight tolerances down to +0.02% absolute and +0.01% matching (1kΩ to 20kΩ). By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce this resistor network series with low temperature coefficients (both absolute and tracking) as well as excellent long-term stability. The Alpha MU series J-lead terminals provide flexibility once the parts are soldered to the board compared to standard fixed surface-mount resistors.

  • 2 element resistor network
  • Each resistor element is available in any resistance between 10Ω and 20kΩ
  • Surface-mount moulded package with J-lead terminations
  • Tight absolute tolerance of ±0.02% for resistances between 1kΩ and 20kΩ with an even tighter matching tolerance of ±0.01% over the same resistance range available
  • Tight absolute TCR of ±5 ppm/°C (from -55°C up to +125°C, between 100Ω and 20kΩ)
  • Tight tracking TCR available of between ±1 ppm/°C and ±5 ppm/°C depending on resistance ratio between the two elements
  • Power rating of 0.05W per resistor element (at +125°C)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +150°C

The MU surface-mount, ultra-precision resistor 1-2-3 network series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

Alpha's MU resistor network series are ideal for use in input and feedback resistors for amplifiers due to both the input and feedback resistors being incorporated into the same package, therefore amplification is not affected by temperature change.

The below table gives a summary of the specifications and options available for the Alpha MU series:

Alpha MU Specifications

* Symbols parenthesized are for part number composition
** Please contact us for resistance availability

£0.00 Ex Tax: £0.00

Alpha NMP Series

The NMP ultra-precision thermosensitive resistor series from Alpha Electronics offers a highly accurate device that has a resistivity which varies linearly with temperature change in a surface mount package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce these resistors that are ideally designed for temperature detection, providing a small size and rapid response.

  • Ultra-precision thermosensitive surface-mount resistor
  • Stocked in 50Ω, 100Ω, 250Ω and 350Ω resistance values with tolerances of ±0.5% and ±2.0%
  • Available in any resistance between 5Ω and 250Ω
  • Tolerance options from ±5.0% down to ±0.5% available
  • Linear +6660 ±2% ppm/°C TCR characteristic (from 0 to +100°C)
  • Response time of 0.4 seconds
  • Maximum working voltage of 50V
  • Power rating of 0.1W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +125°C

These Alpha NMP ultra-precision thermosensitive resistors are made of material only a few µm thick and respond rapidly to temperature changes. Strict control of foil composition maintains uniform quality without fluctuation of temperature characteristics of resistance. They are produced by the same fine photo-etching technology used in other metal foil precision resistors from Alpha.

Typical applications for the NMP ultra-precision thermosensitive resistor series include:
  • Cold junction reference for thermocouples
  • Temperature compensation in load cells
  • Temperature compensation device in semiconductor circuits
  • Temperature sensing devices

The below table gives the full specifications for each resistor model available including the Alpha NMP series:

Alpha NMP Specifications

* Symbols parenthesized are for part number composition

£0.00 Ex Tax: £0.00

Alpha PB Series

The PB ultra-precision through-hole power resistor series from Alpha Electronics offers a power rating of up to 10W on a heat sink using the mounting tabs provided or 2W in free air (at 25°C) with a wide resistance range from 0.4Ω to 50kΩ. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low temperature coefficients down to ±2.5 ppm/°C between the resistance range 1Ω and 50kΩ as well as tight tolerances down to ±0.01% between 50Ω and 50kΩ.

  • Ultra-precision through-hole power resistor
  • Each resistor is available in any resistance between 0.4Ω and 50kΩ
  • 2-Terminal through-hole case-encapsulated package with heat sink mounting
  • Power rating of 10W on a heat sink or 2W in free air at +25°C
  • Tight tolerances as low as ±0.01% available between 50Ω and 50kΩ
  • Tight TCR available of ±2.5 ppm/°C between 1Ω and 50kΩ
  • Maximum working voltage of 750V
  • Maximum working current of 5A
  • Maximum rated operating temperature +25°C
  • Working temperature from -55°C up to +155°C

The PB case-encapsulated, through-hole, ultra-precision power resistor series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision and high power applications.

Pin pitch for the Alpha PB series is 15.0 ±0.5mm.

The below table gives the full specifications for each resistor model available including the Alpha PB series:

Alpha PB Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures for type PB are the values obtained by measuring the leads at point 12.7±3.2mm away from the root, but in case of resistance value below 10Ω, the values at 5.08 ±0.6mm away
** For heat sinking, an aluminium chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used

£0.00 Ex Tax: £0.00

Alpha PC Series

The PC ultra-precision through-hole power resistor series from Alpha Electronics offers 4-terminal (Kelvin) connection for current sensing and a power rating of up to 10W on a heat sink using the mounting tabs provided or 2W in free air (at 25°C) over the resistance range 0.002Ω to 100Ω. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low temperature coefficients down to ±2.5 ppm/°C between the resistance range 0.1Ω and 100Ω as well as tight tolerances down to ±0.01% between 25Ω and 100Ω.

  • Ultra-precision through-hole power resistor
  • Each resistor is available in any resistance between 0.002Ω and 100Ω
  • 4-Terminal (Kelvin) connection through-hole case-encapsulated package with heat sink mounting
  • Power rating of 10W on a heat sink or 2W in free air at +25°C
  • Tight tolerances as low as ±0.01% available between 25Ω and 100Ω
  • Tight TCR available of ±2.5 ppm/°C between 0.1Ω and 100Ω
  • Maximum working voltage of 750V
  • Maximum working current of 32A
  • Maximum rated operating temperature +25°C
  • Working temperature from -55°C up to +155°C

The PC case-encapsulated, through-hole, ultra-precision power resistor series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision and high power applications.

Their 4-terminal design and high precision make them ideal for current sensing applications.

Pin pitch for the Alpha PC series is 15.0 ±0.5mm.

The below table gives the full specifications for each resistor model available including the Alpha PC series:

Alpha PC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures for type PB are the values obtained by measuring the leads at point 12.7±3.2mm away from the root, but in case of resistance value below 10Ω, the values at 5.08 ±0.6mm away
** For heat sinking, an aluminium chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used

£0.00 Ex Tax: £0.00

Alpha PD Series

The PD ultra-precision TO-220 through-hole power resistor series from Alpha Electronics offers a power rating of up to 8W on a heat sink or 1.5W in free air (at 25°C) over a wide resistance range of 0.1Ω to 10kΩ. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low temperature coefficients down to ±2.5 ppm/°C between the resistance range 5Ω and 10kΩ as well as tight tolerances down to ±0.02% between 25Ω and 10kΩ.

  • Ultra-precision through-hole power resistor
  • Each resistor is available in any resistance between 0.1Ω and 10kΩ
  • TO-220 through-hole package
  • Power rating of 8W on a heat sink or 1.5W in free air at +25°C
  • Tight tolerances as low as ±0.02% available between 25Ω and 10kΩ
  • Tight TCR available of ±2.5 ppm/°C between 5Ω and 10kΩ
  • Maximum working voltage of 250V
  • Maximum working current of 4A
  • Maximum rated operating temperature +25°C
  • Working temperature from -55°C up to +155°C

The PD ultra-precision power resistor series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications. Their standard TO-220 package is commonly used for power semiconductor devices making them ideal for new power designs.

Pin pitch for the Alpha PD series is 5.08 ±0.5mm.

The below table gives a summary of the specifications and options available for the Alpha PD series:

Alpha PD Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 5.08 ±0.6mm away from the root
** For heat sinking, an aluminium chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used

£0.00 Ex Tax: £0.00

Alpha PE Series

The PE ultra-precision power shunt resistor series from Alpha Electronics offers 4-terminal (Kelvin) connection for current sensing and a power rating of up to 10W on a heat sink or 1.5W in free air (at +70°C) over a resistance range of 0.5Ω to 500Ω. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low temperature coefficients down to ±2.5 ppm/°C between the resistance range 5Ω and 500Ω as well as tight tolerances down to ±0.01% between 25Ω and 500Ω.

  • Ultra-precision through-hole power shunt resistor
  • Each resistor is available in any resistance between 0.5Ω and 500Ω
  • 4-terminal (Kelvin) connection TO package shunt
  • Power rating of 10W on a heat sink or 1.5W in free air at +70°C
  • Tight tolerances as low as ±0.01% available between 25Ω and 500Ω
  • Tight TCR available of ±2.5 ppm/°C between 5Ω and 500Ω
  • Maximum working current of 5A
  • Maximum rated operating temperature +70°C
  • Working temperature from -55°C up to +155°C

The PE ultra-precision shunt resistor series exhibits excellent high frequency characteristics thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision and high power applications.

Their 4-terminal design and high precision make them ideal for current sensing applications.

Pin pitch for the Alpha PE series is 5.08 ±0.5mm.

The below table gives a summary of the specifications and options available for the Alpha PE series:

Alpha PE Specifications

** For heat sinking, an aluminium chassis in 152.4 (L) x 101.6 (W) x 50.8 (H) x 1.0mm (T) shall be used

£0.00 Ex Tax: £0.00

Alpha RWA Series

The RWA precision wraparound SMD resistor series from Alpha Electronics offers resistances from 100Ω up to 5kΩ, all with a small 0603 chip size. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low tolerances down to ±0.05% (between 1kΩ and 5kΩ) as well as a low TCR of ±5 ppm/°C (between -25°C and +125°C) over the whole resistance range. The Alpha RWA series also offers excellent load-life stability of ±0.005% typical (+70°C, 2000 hours at rated power).

  • High precision wraparound SMD resistor
  • Available in any resistance between 100Ω and 5kΩ
  • 2-terminal resistor in a 0603 surface-mount package
  • Power rating of 0.1W at +70°C
  • Tolerances as low as ±0.05% over the resistance range of 1kΩ to 5kΩ
  • Tight TCR available of ±5 ppm/°C over the resistance range of 100Ω to 5kΩ
  • Maximum working voltage of 22V
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +155°C

The RWA high precision wraparound surface-mount resistor series offers high precision and excellent stability thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

The below table gives the full specifications for each resistor model available including the Alpha RWA series:

Alpha RWA Specifications

£0.00 Ex Tax: £0.00

Alpha RWC Series

The RWC precision wraparound SMD resistor series from Alpha Electronics offers resistances from 5Ω up to 30kΩ, all with a small 1206 chip size. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to offer low tolerances down to ±0.01% (between 1kΩ and 30kΩ) as well as a low TCR of ±2 ppm/°C (between -25°C and +125°C) from 100Ω up to 30kΩ. The Alpha RWC series also offers excellent load-life stability of ±0.005% typical (+70°C, 2000 hours at rated power).

  • High precision wraparound SMD resistor
  • Available in any resistance between 5Ω and 30kΩ
  • 2-terminal resistor in a 1206 surface-mount package
  • Power rating of 0.3W at +70°C
  • Tolerances as low as ±0.01% over the resistance range of 1kΩ to 30kΩ
  • Tight TCR available as low as ±2 ppm/°C over the resistance range of 100Ω to 30kΩ
  • Maximum working voltage of 95V
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +155°C

The RWC high precision wraparound surface-mount resistor series offers high precision and excellent stability thanks to Alpha's Bulk Metal® foil resistor technology, making them suitable for the most demanding precision applications.

The below table gives the full specifications for each resistor model available including the Alpha RWC series:

Alpha RWC Specifications

£0.00 Ex Tax: £0.00

Ametherm ACC-001

The ACC-001 precision interchangeable NTC thermistor from Ametherm is part of their ACCU-CURVE™ series. The ACC-001 offer a high degree of accuracy and reliability with a resistance of 2.252kΩ at +25°C and a temperature tolerance of ±0.2°C between 0°C and +70°C. The Ametherm ACCU-CURVE™ series commonly perform temperature sensing, control and compensation for medical, industrial and automotive applications. The complete series offers interchangeability over a broad temperature range and eliminates the need to individually calibrate or provide circuit compensation for part variability.

  • Precision interchangeable NTC thermistor
  • Small bead design with 32AWG tinned copper leads
  • Resistance of 2.252kΩ (at 25°C)
  • Temperature tolerance of ±0.2°C between 0°C and +70°C
  • Resistance / temperature curve "C"
  • Dissipation constant of 1mW/°C (minimum)
  • Thermal time constant of 3.5s nominal
  • Beta value of 3892°K (0°C / 50°C)
  • Maximum power rating of 250mW
  • Brown colour code

Typical applications for the ACCU-CURVE™ series include:

  • Temperature sensing
  • Control systems
  • Compensation systems
The below table gives the full specifications of the Ametherm ACCU-CURVE™ series including the ACC-001 thermistor:

Ametherm ACCU-CURVE™ Specifications

£0.00 Ex Tax: £0.00

Ametherm ACC-002

The ACC-002 precision interchangeable NTC thermistor from Ametherm is part of their ACCU-CURVE™ series. The ACC-002 offer a high degree of accuracy and reliability with a resistance of 3kΩ at +25°C and a temperature tolerance of ±0.2°C between 0°C and +70°C. The Ametherm ACCU-CURVE™ series commonly perform temperature sensing, control and compensation for medical, industrial and automotive applications. The complete series offers interchangeability over a broad temperature range and eliminates the need to individually calibrate or provide circuit compensation for part variability.

  • Precision interchangeable NTC thermistor
  • Small bead design with 32AWG tinned copper leads
  • Resistance of 3kΩ (at 25°C)
  • Temperature tolerance of ±0.2°C between 0°C and +70°C
  • Resistance / temperature curve "C"
  • Dissipation constant of 1mW/°C (minimum)
  • Thermal time constant of 3.5s nominal
  • Beta value of 3892°K (0°C / 50°C)
  • Maximum power rating of 250mW
  • Red colour code

Typical applications for the ACCU-CURVE™ series include:

  • Temperature sensing
  • Control systems
  • Compensation systems
The below table gives the full specifications of the Ametherm ACCU-CURVE™ series including the ACC-002 thermistor:

Ametherm ACCU-CURVE™ Specifications

£0.00 Ex Tax: £0.00

Ametherm ACC-003

The ACC-003 precision interchangeable NTC thermistor from Ametherm is part of their ACCU-CURVE™ series. The ACC-003 offer a high degree of accuracy and reliability with a resistance of 5kΩ at +25°C and a temperature tolerance of ±0.2°C between 0°C and +70°C. The Ametherm ACCU-CURVE™ series commonly perform temperature sensing, control and compensation for medical, industrial and automotive applications. The complete series offers interchangeability over a broad temperature range and eliminates the need to individually calibrate or provide circuit compensation for part variability.

  • Precision interchangeable NTC thermistor
  • Small bead design with 32AWG tinned copper leads
  • Resistance of 5kΩ (at 25°C)
  • Temperature tolerance of ±0.2°C between 0°C and +70°C
  • Resistance / temperature curve "C"
  • Dissipation constant of 1mW/°C (minimum)
  • Thermal time constant of 3.5s nominal
  • Beta value of 3892°K (0°C / 50°C)
  • Maximum power rating of 250mW
  • Orange colour code

Typical applications for the ACCU-CURVE™ series include:

  • Temperature sensing
  • Control systems
  • Compensation systems
The below table gives the full specifications of the Ametherm ACCU-CURVE™ series including the ACC-003 thermistor:

Ametherm ACCU-CURVE™ Specifications

£0.00 Ex Tax: £0.00

Ametherm ACC-004

The ACC-004 precision interchangeable NTC thermistor from Ametherm is part of their ACCU-CURVE™ series. The ACC-004 offer a high degree of accuracy and reliability with a resistance of 10kΩ at +25°C and a temperature tolerance of ±0.2°C between 0°C and +70°C. The Ametherm ACCU-CURVE™ series commonly perform temperature sensing, control and compensation for medical, industrial and automotive applications. The complete series offers interchangeability over a broad temperature range and eliminates the need to individually calibrate or provide circuit compensation for part variability.

  • Precision interchangeable NTC thermistor
  • Small bead design with 32AWG tinned copper leads
  • Resistance of 10kΩ (at 25°C)
  • Temperature tolerance of ±0.2°C between 0°C and +70°C
  • Resistance / temperature curve "C"
  • Dissipation constant of 1mW/°C (minimum)
  • Thermal time constant of 3.5s nominal
  • Beta value of 3892°K (0°C / 50°C)
  • Maximum power rating of 250mW
  • Yellow colour code

Typical applications for the ACCU-CURVE™ series include:

  • Temperature sensing
  • Control systems
  • Compensation systems
The below table gives the full specifications of the Ametherm ACCU-CURVE™ series including the ACC-004 thermistor:

Ametherm ACCU-CURVE™ Specifications

£0.00 Ex Tax: £0.00

Ametherm ACW-005

The ACW-005 precision interchangeable NTC thermistor from Ametherm is part of their ACCU-CURVE™ series. The ACW-005 offer a high degree of accuracy and reliability with a resistance of 30kΩ at +25°C and a temperature tolerance of ±0.2°C between 0°C and +70°C. The Ametherm ACCU-CURVE™ series commonly perform temperature sensing, control and compensation for medical, industrial and automotive applications. The complete series offers interchangeability over a broad temperature range and eliminates the need to individually calibrate or provide circuit compensation for part variability.

  • Precision interchangeable NTC thermistor
  • Small bead design with 32AWG tinned copper leads
  • Resistance of 30kΩ (at 25°C)
  • Temperature tolerance of ±0.2°C between 0°C and +70°C
  • Resistance / temperature curve "W"
  • Dissipation constant of 1mW/°C (minimum)
  • Thermal time constant of 3.5s nominal
  • Beta value of 4143°K (0°C / 50°C)
  • Maximum power rating of 250mW
  • Green colour code

Typical applications for the ACCU-CURVE™ series include:

  • Temperature sensing
  • Control systems
  • Compensation systems
The below table gives the full specifications of the Ametherm ACCU-CURVE™ series including the ACW-005 thermistor:

Ametherm ACCU-CURVE™ Specifications

£0.00 Ex Tax: £0.00

Ametherm ACW-006

The ACW-006 precision interchangeable NTC thermistor from Ametherm is part of their ACCU-CURVE™ series. The ACW-006 offer a high degree of accuracy and reliability with a resistance of 50kΩ at +25°C and a temperature tolerance of ±0.2°C between 0°C and +70°C. The Ametherm ACCU-CURVE™ series commonly perform temperature sensing, control and compensation for medical, industrial and automotive applications. The complete series offers interchangeability over a broad temperature range and eliminates the need to individually calibrate or provide circuit compensation for part variability.

  • Precision interchangeable NTC thermistor
  • Small bead design with 32AWG tinned copper leads
  • Resistance of 50kΩ (at 25°C)
  • Temperature tolerance of ±0.2°C between 0°C and +70°C
  • Resistance / temperature curve "W"
  • Dissipation constant of 1mW/°C (minimum)
  • Thermal time constant of 3.5s nominal
  • Beta value of 4143°K (0°C / 50°C)
  • Maximum power rating of 250mW
  • Blue colour code

Typical applications for the ACCU-CURVE™ series include:

  • Temperature sensing
  • Control systems
  • Compensation systems
The below table gives the full specifications of the Ametherm ACCU-CURVE™ series including the ACW-006 thermistor:

Ametherm ACCU-CURVE™ Specifications

£0.00 Ex Tax: £0.00

Ametherm ACW-007

The ACW-007 precision interchangeable NTC thermistor from Ametherm is part of their ACCU-CURVE™ series. The ACW-007 offer a high degree of accuracy and reliability with a resistance of 100kΩ at +25°C and a temperature tolerance of ±0.2°C between 0°C and +70°C. The Ametherm ACCU-CURVE™ series commonly perform temperature sensing, control and compensation for medical, industrial and automotive applications. The complete series offers interchangeability over a broad temperature range and eliminates the need to individually calibrate or provide circuit compensation for part variability.

  • Precision interchangeable NTC thermistor
  • Small bead design with 32AWG tinned copper leads
  • Resistance of 100kΩ (at 25°C)
  • Temperature tolerance of ±0.2°C between 0°C and +70°C
  • Resistance / temperature curve "W"
  • Dissipation constant of 1mW/°C (minimum)
  • Thermal time constant of 3.5s nominal
  • Beta value of 4143°K (0°C / 50°C)
  • Maximum power rating of 250mW
  • Violet colour code

Typical applications for the ACCU-CURVE™ series include:

  • Temperature sensing
  • Control systems
  • Compensation systems
The below table gives the full specifications of the Ametherm ACCU-CURVE™ series including the ACW-007 thermistor:

Ametherm ACCU-CURVE™ Specifications

£0.00 Ex Tax: £0.00