SPST
Single Pole Single Throw relay.
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Product
Level Monitoring
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Magnetic level switches are used for the monitoring and control of liquid level in tanks. These level switches are specifically manufactured to customer specifications. The float switches are manufactured with a hermetically sealed contact which is located within the guide tube. The float sliding on the tube contains a ring magnet which activates the sealed contact in a non-contacting fashion. The sealed contacts are available as SPST (N/O or N/C) or SPDT (N/O + N/C). The float sliding up and down on the guide tube is the only moving part on the M-series magnetic float switches.
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Product
PXI/PXIe High Density Electro-mechanical Relay Module, 32xSPDT
42-148A-001
Relay
The 40-148A-001 (PXI) and 42-148A-001 (PXIe) 32xSPDT relay module is part of a range of high density switching modules available in Normally Open (SPST & DPST), Changeover (SPDT) and Normally Closed (SPST) configurations. Connections are made via a front panel 200-pin female connector.
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Product
PXI 32 x SPDT Reed Relay
40-110-121
Relay
Our 40-110 and 40-115 range of reed relay switching modules are available in both Changeover (SPDT) and Normally Open (SPST & DPST) configurations. Connections are made via a front panel 96 pin male micro-D connector. For applications requiring improved bandwidth and crosstalk performance please look at our 40-120/125 range of shielded reed relay cards. General purpose reed relays are suitable for the construction of small switching networks, for slaving up to larger switches or for operating external devices (e.g. lamps, solenoids etc.). To simplify inter-relay wiring, interconnection points are built onto the circuit board thus easing the construction of complicated wiring.
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Product
LXI Optical Switching - 8:1 Multiplexer Plugin Module
65-281-323
Multiplexer Module
The 65-281-323 8:1 multiplexer is part of the 65-280 and 65-281 ranges of optical plug-in modules offering matrix & insert/bypass or multiplexer & SPST topologies respectively with all models based on MEMS fiber optic switches and available in various populations per plugin. In addition, a choice of different connector styles to suit most applications is offered: FC/APC (for optimal performance), FC/PC, SC/PC and ST for general applications and LC for high density applications. They use MEMS (Micro-Electro-Mechanical-Systems) based optical switches to route signals between terminals by redirecting the optical signal. This is achieved using micromechanical mirrors driven by a highly precise mechanism activated via an electrical control signal.
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Product
PXI/PXIe High Density Electro-mechanical Relay Module, 100xSPST, Normally Open
40-145A-201
Relay
The 40-145A-201 (PXI) and 42-145A-201 (PXIe) 100xSPST relay module is part of a range of high density switching modules available in Normally Open (SPST & DPST), Changeover (SPDT) and Normally Closed (SPST) configurations. Connections are made via a front panel 200-pin female connector.
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Product
PXI Power Relay Module, 12xSPST, 16 A
40-161A-002
Relay
The 40/42-161A-002 is a PXI/PXIe 12xSPST power relay module and is part of a range of high density power switching solutions with a choice of SPST, and SPDT relay configurations with or without hardware interlock. Electro-mechanical power relays are used wich are suitable for switching loads up to 16 A at 250 VAC.
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Product
PXI/PXIe High Density Electro-mechanical Relay Module, 25xDPST
40-146A-002
Relay
The 40-146A-002 (PXI) and 42-146A-002 (PXIe) 25xDPST relay module is part of a range of high density switching modules available in Normally Open (SPST & DPST), Changeover (SPDT) and Normally Closed (SPST) configurations. Connections are made via a front panel 200-pin female connector.
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Product
PXI/PXIe High Density Reed Relay Module, 50xSPST
40-140B-021
Reed Relay
The 40-140B-021 (PXI) and 42-140B-021 (PXIe) are 50xSPST general purpose switching modules. They are part of a range of high density relay modules using ruthenium reeds available in 50x, 75x and 100x Normally Open SPST configurations. Connections are made via a front panel 200-pin female connector.
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Product
PXI 12xSPDT 16A Power EMR Module
40-161-101
Relay
This40-161 range of PXI power relay modules is available with achoice of 16 x SPST, 12 x SPST, 10 x SPST, 12 x SPDT and 6 x SPDT power relays, for switching loads up to 16A at250VAC. These Power Relay Modules are intended for switching heavy AC or DC loads or for the slave switching of large external relays, contactors and solenoids. The 40-161 is ideal for switching up to 16A in both AC and DC applications.
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Product
PXI/PXIe High Density Reed Relay Module, 75xSPST
40-140B-121
Reed Relay
The 40-140B-121 (PXI) and 42-140B-121 (PXIe) are 75xSPST general purpose switching modules. They are part of a range of high density relay modules using ruthenium reeds available in 50x, 75x and 100x Normally Open SPST configurations. Connections are made via a front panel 200-pin female connector.
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Product
PXI/PXIe High Density Reed Relay Module, 50xSPST
42-140B-021
Reed Relay
The 40-140B-021 (PXI) and 42-140B-021 (PXIe) are 50xSPST general purpose switching modules. They are part of a range of high density relay modules using ruthenium reeds available in 50x, 75x and 100x Normally Open SPST configurations. Connections are made via a front panel 200-pin female connector.
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Product
PCI 32xSPST Shielded Reed Relay Card
50-125-021
Reed Relay
The 50-110/115 range of PCI shielded switching cards are available in both Changeover (SPDT) and Normally Open (SPST & DPST) configurations. Connections are made via a front panel 200 pin female connector.
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Product
PXI-2569 , 31-Channel, 2 A, SPST PXI Relay Module
778572-69
Relay
31-Channel, 2 A, SPST PXI Relay Module—The PXI‑2569 is a general-purpose switch module that features independent single‑pole single‑throw (SPST) Form A armature relays. It is fully software programmable and contains a 32,000‑step scan list for deterministic scanning capability. This module offers maximum relay density, so it is ideal for medium-power automated test loads.
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Product
PXI Solid-State Switch Module, 3xSPST, 25 A, 100 V, Hardware Interlock
40-184A-002-HI
Switch Module
The 40-184A-002-HI has 3-off high current SPST switches with hardware interlock in one PXI slot and is part of our range of high power solid state switching solutions.
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Product
PXI Solid State Switch Module, 6xSPST, 30 A, Hardware Interlock
40-183B-011-HI
Switch Module
The 40-183B-011-HI has 6 high current SPST switches with hardware interlock in two PXI chassis slots. Each SPST switch uses a fully isolated solid state relay which has been designed to offer fast operation under hot switching conditions and high inrush current with no operational life degradation.
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Product
PXI/PXIe Power Relay Module, 3xSPDT, 20 Amp
42-166-102
Relay
The 40/42-166-102 is a PXI/PXIe high density power relay module with 3xSPDT switches rated at 20A. The 40/42-166 range is available with SPST, SPDT or SP4T switching configurations.
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Product
Flow Indicator
Qualitrol 092
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Designed to indicate “pump on” and “pump off” conditions within a forced cooling system. Select models also indicate flow direction. Up to two SPST or SPDT switches are available for control and/or alarm functions. Large dial face provides easy viewing and is magnetically coupled to the flange assembly allowing leak free replacement if damaged.
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Product
PXI-2564 , 16-Channel, 5 A, SPST PXI Relay Module
PXI-2564 / 778572-64
Relay
16-Channel, 5 A, SPST PXI Relay Module—The PXI‑2564 is a general-purpose switch module that features independent single‑pole single‑throw (SPST) Form A armature relays. Each relay is nonlatching with very low on-resistance and low thermal offsets. The PXI‑2564 is fully software programmable. With an efficient coupling of voltage/current capability and relay density, this switch module is ideal for switching medium‑ to high‑power signals and loads in military, automotive, or automated test applications.
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Product
Cable Free ATE
CABLEFREEATE
test
Digalog Systems customizes resources to provide requirements or more cost-effective requirements that are not currently on the market.The CableFreeATE™ technology also affords lower cost and easier integration of some common offerings:- VPC 64 SPST Reed Relay- 0.1" Discrete Header 64 SPST Reed Relay- DL1-156R 72 SPST Reed Relay
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Product
PXIe Power Relay Module, 6xSPDT, 16 A
42-161A-102
Relay
The 40/42-161A-102 is a PXI/PXIe 6xSPDT power relay module and is part of a range of high density power switching solutions with a choice of SPST, and SPDT relay configurations with or without hardware interlock.
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Product
PXI Programmable Resistor Card 2-Channel 2.5 Ohm to 1.02k Ohm - SPST
40-294-121
Programmable Resistor Module
These PXI Programmable Resistor modules are available with either two channels of 16-bit, two channels of 12-bit or four channels of 8-bit resistor chains in a single 3U PXI module. The module is ideal for simulating sensors for control and management systems under test, allowing the user to verify system response in design verification or manufacturing test applications.
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Product
PXI-2568, 31-Channel, 2 A, SPST PXI Relay Module
778572-68
Relay
31-Channel, 2 A, SPST PXI Relay Module—The PXI‑2568 is a general-purpose switch module that features independent single‑pole single‑throw (SPST) Form A armature relays. Each relay is nonlatching with very low on-resistance and low thermal offsets. The PXI‑2568 is fully software programmable. With an efficient coupling of voltage/current capability and relay density, this switch module is ideal for automated test equipment (ATE) loads or for controlling heaters, lights, and fans.
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Product
PXI 50 X DPST Ruthenium Reed Relays
40-141-022
Relay
The 40-140A/141/143 range of high density switching modules are available in Normally Open (SPST & DPST) and changeover (SPDT) configurations. Connections are made via a front panel 200 pin female connector.
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Product
SP1T RF Pin Diode Switches To 18 GHz
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Pulsar Microwave manufactures pin diode RF switches that are controlled by TTL logic. This configuration is known as single pole, single throw and is often abbreviated SPST or SP1T. They have been engineered to function in 50-ohm systems, and are designed to operate from 40 MHz to 18 GHz. They have a switching time of 100 nanoseconds and input power rating of 200 mW (23 dBm). Performance of 1.6:1 or better VSWR and minimum isolation of 60 dB is typical of most models.All switches of this type require both +5VDC and -5VDC to operate. Typical current consumption is +/- 30 mA. TTL control logic of 0 to +5VDC is required. Units comes standard with SMA connectors.
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Product
PXI/PXIe High Density Reed Relay Module, 100xSPST
42-140-221
Reed Relay
The 40-140B-221 (PXI) and 42-140B-221 (PXIe) are 100xSPST general purpose switching modules. They are part of a range of high density relay modules using ruthenium reeds available in 50x, 75x and 100x Normally Open SPST configurations. Connections are made via a front panel 200-pin female connector.
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Product
PXI/PXIe High Density Reed Relay Module, 75xSPST
42-140B-121
Reed Relay
The 40-140B-121 (PXI) and 42-140B-121 (PXIe) are 75xSPST general purpose switching modules. They are part of a range of high density relay modules using ruthenium reeds available in 50x, 75x and 100x Normally Open SPST configurations. Connections are made via a front panel 200-pin female connector.
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Product
PXI Programmable Resistor Card 2-Channel 2.5 Ohm to 8.19k Ohm - SPST
40-294-124
Programmable Resistor Module
These PXI Programmable Resistor modules are available with either two channels of 16-bit, two channels of 12-bit or four channels of 8-bit resistor chains in a single 3U PXI module. The module is ideal for simulating sensors for control and management systems under test, allowing the user to verify system response in design verification or manufacturing test applications.
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Product
PXI Programmable Resistor Card 4-Channel 2 Ohm to 510 Ohm - SPST
40-294-114
Programmable Resistor Module
These PXI Programmable Resistor modules are available with either two channels of 16-bit, two channels of 12-bit or four channels of 8-bit resistor chains in a single 3U PXI module. The module is ideal for simulating sensors for control and management systems under test, allowing the user to verify system response in design verification or manufacturing test applications.
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Product
SIMRC - 8 x Reed Relay Module, SPST
1010-R-8-1-5/1D
Reed Relay
Our small format embedded switching (SIM relay) cards offer a choice of switching configurations using low cost industry standard SIM connectors. They free the designer from the detail of routing complex switching circuits, you may select from a wide range of cards using the built in RS-232 and I2C interfaces. These low-cost embedded switching cards are intended to be mounted on to a simple motherboard. They may be used to construct very high density switching networks. SIM based switching cards also allow for very simple in-field maintenance.
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Product
PXI Source Switching Module
40-618-001
Switch Module
The 40-618 PXI Source Switching Module consists of 12 separate 4-channel multiplexers and 44 uncommitted SPST relay contacts in a single width PXI module. Typical applications include signal routing for avionics test systems that conform to the ARINC 608A specification.





























