Test and Measurement

Test and Measurement

Our range for Test & Measurement:

  • Range of standard resistors for calibration purposes from Alpha Electronics and Isabellenhütte
  • Vast selection of precision and ultra-precision resistors, current sensing shunts and low ohmic resistors and power resistors in various through-hole and surface-mount packages in virtually any resistance value from Alpha Electronics, Caddock, General Resistance, Isabellenhütte, Riedon, Susumu and Vishay Foil Resistors
  • Range of NTC and PTC thermistors and inrush current limiters from Ametherm
  • High quality, high voltage relays handling up to 15kV from Cynergy3
  • Data acquisition modules from DGH with number of analog and digital input and output options, offering possibility to easily set up a customised plug-and-play data acquisition system
  • Isabellenhütte's innovative solution for battery management system applications - the IsaSCALE IVT-S is a plug-and-play module for precise current and voltage measurement in package fitting into palm of your hand
  • Robust, high quality general purpose and precision load cells in range of packages by Lord Sensing Stellar Technology
  • Variety of magnetic sensors and digital isolators from NVE Corporation based on their patented spintronic GMR technology
Show:
Sort By:

Alpha ADR 6-Dial Series

The ADR 6-dial decade resistance box series from Alpha Electronics, with 6½ digit readings, features ultra precision resistors, low contact resistance rotary switches, low thermal EMF output terminals and the double shielded construction. There are 5 models of the ADR 6-dial decade resistance box available, each offering different resistance ranges starting from 0.1Ω minimum to 1.111210KΩ maximum up to 10Ω minimum to 11.11110MΩ maximum.

  • 6-Dial decade resistance box
  • Accuracy down to ≤0.005% +2mΩ for some models
  • Temperature coefficient of resistance ≤5ppm /°C
  • Long-term stability in resistance ≤50ppm/year (storage life)
  • Low contact resistance switch and three clip-typed contacts in parallel
  • Low thermal EMF terminal
  • Double electrical shielding protective against noise
  • Maximum power rating of 0.5W

All resistors used in this Decade Resistance Box are from the ultra precision Bulk Metal® Foil resistors manufactured by Alpha Electronics, assuring high stability over time and environment change.

The rotary switches have very low contact resistance which is achieved by connecting three clip-type contacts in parallel. This method also ensures a higher mechanical reliability. Low thermal EMF output terminals use a low thermal resistance rectangular wire circuit configuration. A double shielded construction inhibits interference of environmental noise.

The ADR 6-dial resistance box series has a weight of approximately 4.5kg and dimensions of 430mm x 140mm x 99mm.

The below table gives the full specifications for each model available of the Alpha ADR 6-dial decade resistance box series:

Alpha ADR 6-Dial Specifications

£0.00 Ex Tax: £0.00

Alpha ASR Series

The ASR series from Alpha Electronics is an extremely stable standard resistor. It utilises their Ni/Cr alloy Bulk Metal® Foil technology for the resistive elements, which helps provide high stability and a low temperature coefficient. With the extreme stability of this resistor relative to temperature change, the ASR can be used in air without the need of an oil bath or critical environmental temperature control, eliminating added operation and maintenance costs.

  • Standard Resistor
  • Excellent long-term stability of resistance, less than 3 ppm/year
  • Low temperature coefficient, less than 0.2 ppm/°C
  • Resistance options between 1Ω to 10MΩ available
  • Excellent AC characteristics due to Bulk Metal® Foil technology
  • Compact construction designed for simple operation and storage
  • Power rating of 0.1W (0.5W for the ADR-1R0 model)
  • Maximum working temperature of +50°C
  • Operating temperature range of 0 to +50°C
  • Storage temperature range from -10°C to +60°C

Due to Alpha Electronics long-term experience in developing and enhancing ultra-stable Bulk Metal® Foil technology, they are able to provide products with consistency of performance under strict quality control. The ASR is designed to be used in a wide range of environments; from making precise measurements on the production floor, to providing corporate traceability as a calibration and reference standard.

The resistors are mounted within a compact and sturdy box. A cover is provided to protect the resistors and connection terminals from damage during transport and storage.

The ASR series has a weight of approximately 2.5kg and dimensions of 155mm x 97mm x 112mm.

The below table gives the full specifications for each model available of the Alpha ASR series:

Alpha ASR Specifications

* Power = Power rating.

£0.00 Ex Tax: £0.00

Alpha ATV Series

The ATV series from Alpha Electronics is a current / voltage (I/V) conversion adaptor used to accurately measure current using a voltage meter. Its small, lightweight construction enables it to be easily attached directly to a voltage meter for ease of operation.

  • Current / voltage conversion adaptor
  • Compact size
  • Lightweight
  • Full resistance range available from 1Ω to 100kΩ
  • Temperature coefficient of ±2.5 ppm/°C
  • ±0.1% accuracy
  • Maximum working current of up to 0.5A (ATV-1R0 1Ω model)
  • Power rating of 0.1W (0.25W for the ATV-1R0 model)

Each model corresponds to a set resistance value and maximum working current.

The below table gives the full specifications for each model available of the Alpha ATV series:

Alpha ATV Specifications

£0.00 Ex Tax: £0.00

Alpha FLA Series

The FLA conformally coated resistor series from Alpha Electronics offers a very precise resistor with a resistance range from 10Ω up to 100kΩ all in a small through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Conformally coated through-hole resistor
  • Available in any resistance between 10Ω and 100kΩ
  • Tight tolerance options as low as ±0.05% available for resistances between 100Ω and 100kΩ
  • Tight TCR options available of ±2.5 ppm/°C or ±5 ppm/°C (from -25°C up to +125°C)
  • Maximum working voltage of 250V
  • Power rating of 0.125W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -25°C up to +155°C

The Alpha Electronics FLA precision resistor series have been designed with terminals that are easy for insertion into the PCB.

The FLB series has a pin pitch of 2.54 ±0.25mm.

Alpha's Bulk Metal® foil resistor technology means that these conformally coated, through-hole, precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

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

Alpha FLA Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring at the point 2.5 ±1.0mm below the shoulder of the leads

£0.00 Ex Tax: £0.00

Alpha FLB Series

The FLB conformally coated resistor series from Alpha Electronics offers a very precise resistor with a resistance range from 10Ω up to 150kΩ all in a small through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Conformally coated through-hole resistor
  • Available in any resistance between 10Ω and 150kΩ
  • Tight tolerance options as low as ±0.05% available for resistances between 100Ω and 150kΩ
  • Tight TCR options available of ±2.5 ppm/°C or ±5 ppm/°C (from -25°C up to +125°C)
  • Maximum working voltage of 300V
  • Power rating of 0.25W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -25°C up to +155°C

The Alpha Electronics FLB precision resistor series have been designed with terminals that are easy for insertion into the PCB.

The FLB series has a pin pitch of 2.54 ±0.25mm.

Alpha's Bulk Metal® foil resistor technology means that these conformally coated, through-hole, precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

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

Alpha FLB Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring at the point 2.5 ±1.0mm below the shoulder of the leads

£0.00 Ex Tax: £0.00

Alpha FLC Series

The FLC conformally coated resistor series from Alpha Electronics offers a very precise resistor with a resistance range from 10Ω up to 200kΩ all in a small through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Conformally coated through-hole resistor
  • Available in any resistance between 10Ω and 200kΩ
  • Tight tolerance options as low as ±0.05% available for resistances between 100Ω and 200kΩ
  • Tight TCR options available of ±2.5 ppm/°C or ±5 ppm/°C (from -25°C up to +125°C)
  • Maximum working voltage of 300V
  • Power rating of 0.25W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -25°C up to +155°C

The Alpha Electronics FLC precision resistor series have been designed with terminals that are easy for insertion into the PCB.

The FLC series has a pin pitch of 5.08 ±0.25mm.

Alpha's Bulk Metal® foil resistor technology means that these conformally coated, through-hole, precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

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

Alpha FLC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring at the point 2.5 ±1.0mm below the shoulder of the leads

£0.00 Ex Tax: £0.00

Alpha HD Series

The HD resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package. With a resistance range from 1Ω up to 120kΩ all in a small through-hole package with a pin pitch of 5.08 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 1Ω and 120kΩ
  • Through-hole package with a pin pitch of 5.08 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 120kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω and 120kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω up to 120kΩ)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HD hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HD series:

Alpha HC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type HC and HD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha HG Series

The HG resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package. With a resistance range from 1Ω up to 10kΩ all in a four-terminal (Kelvin) connection design through-hole package. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 1Ω and 10kΩ
  • Through-hole package with four-terminal (Kelvin) connection design
  • Tight tolerance options as low as ±0.005% available for resistances between 10Ω and 10kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C) or ±2.5 ppm/°C (from -55°C up to +125°C)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HG hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HG series:

Alpha HG Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type HC and HD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha HK Series

The HK resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package all with a zero-TCR. With a resistance range from 100Ω up to 100kΩ all in a small through-hole package with a pin pitch of 3.81 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with a zero-TCR (0±15 ppm/°C between 0°C and +50°C) and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 100Ω and 100kΩ
  • Through-hole package with a pin pitch of 3.81 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 120kΩ
  • Characteristic S Zero-TCR (0±15 ppm/°C from 0°C and +50°C)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HK hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HK series:

Alpha HC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are obtained by measuring the leads at point 12.7 ±3.2mm away from the root

£0.00 Ex Tax: £0.00

Alpha HL Series

The HL resistor series from Alpha Electronics offers their ultra-precision resistor capabilities in a hermetically sealed package all with a zero-TCR. With a resistance range from 100Ω up to 100kΩ all in a small through-hole package with a pin pitch of 5.08 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with a zero-TCR (0±15 ppm/°C between 0°C and +50°C) and excellent long-term stability.

  • Ultra-precision hermetically sealed resistor
  • Available in any resistance between 100Ω and 100kΩ
  • Through-hole package with a pin pitch of 5.08 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 120kΩ
  • Characteristic S Zero-TCR (0±15 ppm/°C from 0°C up to +50°C)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +150°C

The Alpha Electronics HL hermetically sealed ultra-precision resistor series have been designed with longer leads to ensure the correct clearance from the PCB is achieved when soldering. It is advised that the resistors are kept over 10mm away from the board surface by using an insulating tube.


The below table gives a summary of the specifications available for each resistor model including the Alpha HL series:

Alpha HC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are obtained by measuring the leads at point 12.7 ±3.2mm away from the root

£0.00 Ex Tax: £0.00

Alpha KLC Series

The KLC 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 through-hole 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. The temperature characteristics for the KLC series can be freely adjusted, please see the datasheet under the Technical Library tab or the TCR against resistance values available graph below for further details.

  • Ultra-precision thermosenstive through-hole resistor
  • Available in a wide range of resistance values from 20Ω to 40kΩ
  • Tolerance options from ±5.0% down to ±0.5% available
  • Temperature characteristics can be freely adjusted and are almost linear
  • Maximum working voltage of 300V
  • Power rating of 0.25W (at +70°C)
  • Maximum rated operating temperature +70°C
  • Working temperature from -65°C up to +125°C

These Alpha KLC ultra-precision thermosensitive resistors are made of material only a few µm thick and responds 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.

The KLC series has a pin pitch of 7.62 ±0.25mm.

Typical applications for the KLC 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 graph represents possible TCR values against resistance values available for the KLC thermosensitive resistor series. Please see the datasheet under the Technical Library tab for the full specifications for the KLC series.

Possible TCR values against resistance values available graph

Graph showing possible TCR options against resistance values available in the KLC series.

£0.00 Ex Tax: £0.00

Alpha LSR Series

The LSR high power standard resistor series from Alpha Electronics was developed to meet the requirements of high current / low resistance applications. Bulk Metal® Foil resistive elements are used to ensure the best long-term stability and lowest temperature coefficients are achieved. The enclosure is manufactured from perforated aluminium to allow effective air flow and temperature dissipation during high power operation. The LSR series is designed to be used in air without oil bath submersion or additional cooling.

  • High power standard resistor
  • Long-term stability better than 20 ppm/year
  • Temperature coefficient of ±2.5 ppm/°C
  • Temperature efficient design to control self-heating
  • Excellent AC characteristics due to Bulk Metal® Foil technology
  • Compact construction designed for simple operation and storage
  • Maximum power rating of 4W available
  • Working temperature range of +18°C to +28°C
  • Storage temperature range of 0 to +50°C
  • 4-terminals

LSR high power standard resistor series is suitable for a range of applications such as high precision measurement, corporate metrology calibration labs and references for precision power supplies.

The 1mΩ version has an option to change the terminal knobs for 4W (63A) power measuring capabilities. The P at the end of the model number denotes the high power option.

The LSR series has a weight of approximately 0.6kg and dimensions of 140mm x 90mm x 90mm.

The below table gives the full specifications for each model available of the Alpha LSR series:

Alpha LSR Specifications

£0.00 Ex Tax: £0.00

Alpha MA Series

The MA ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 1Ω up to 200kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 3.81 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision transfer moulded resistor
  • Available in any resistance between 1Ω and 200kΩ
  • Through-hole package with a pin pitch of 3.81 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 200kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω up to 200kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω up to 200kΩ)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C) or 0.2W (at 150kΩ or above)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +175°C

Alpha's Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.

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

Alpha MA Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha MB Series

The MB ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 5Ω up to 400kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 7.5 ±0.5mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision transfer moulded resistor
  • Available in any resistance between 1Ω and 200kΩ
  • Through-hole package with a pin pitch of 7.5±0.5mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 400kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω and 400kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω and 400kΩ)
  • Maximum working voltage of 350V
  • Power rating of 0.5W (at +125°C) or 0.3W (at 200kΩ or above)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +175°C

Alpha's Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.

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

Alpha MB Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00

Alpha MC Series

The MC ultra-precision transfer moulded resistor series from Alpha Electronics offers a wide resistance range from 1Ω up to 200kΩ with tight tolerances, all in a small through-hole package with a pin pitch of 5.08 ±0.25mm. By utilising Alpha's Bulk Metal® foil resistor technology, they are able to produce resistors with low temperature coefficients and excellent long-term stability.

  • Ultra-precision transfer moulded resistor
  • Available in any resistance between 1Ω and 200kΩ
  • Transfer moulded through-hole package with a pin pitch of 5.08 ±0.25mm
  • Tight tolerance options as low as ±0.005% available for resistances between 30Ω and 200kΩ
  • Tight TCR options available of ±1 ppm/°C (from 0°C up to +65°C, between 30Ω and 200kΩ) or ±2.5 ppm/°C (from -55°C up to +125°C, between 30Ω and 200kΩ)
  • Maximum working voltage of 300V
  • Power rating of 0.3W (at +125°C) or 0.2W (at 150kΩ or above)
  • Maximum rated operating temperature +125°C
  • Working temperature from -65°C up to +175°C

Alpha's Bulk Metal® foil resistor technology means that these transfer moulded, through-hole, ultra-precision resistors are ideal for precision measurements, also their low inductance makes them ideal for use at higher frequencies.

These resistors are constructed using an outer coating of transfer moulded epoxy resin, making the parts strongly resistant to heat, moisture and solvents. Internally, there are secondary leads which act as a buffer so that stress on the exterior leads is not transmitted to the foil, providing stability against vibrations when the resistor is mounted on a circuit.

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

Alpha MC Specifications

* Symbols parenthesized are for part number composition
✝ Resistance figures are the values obtained by measuring the leads at point 12.7±3.2mm away from the base for type MB, MC and MD, but, in case of resistance below 10Ω, the value at 1.6 ±0.6mm away from the base for all types
** Temperature characteristic Z is applicable for temperature range between 0°C and +60°C

£0.00 Ex Tax: £0.00