Weschler Instruments is a manufacturer and distributor of electrical and electronic measurement equipment. Customers worldwide use our products in power plants, steel mills, chemical plants, paper mills and other industrial applications that require rugged, reliable and accurate instrumentation.
AT and ATP current transducers combine a current transformer and signal conditioner in a single package. These transducers offer jumper selected current input ranges with proportional industry standard 4-20 mA, 0-5 VDC and 0-10 VDC outputs. The AT and ATP series are designed for application on “linear” or sinusoidal AC loads. Available in a split core or two types of solid core cases.
ATR and ATPR transducers combine a current transformer and True RMS signal conditioner in a single package. The ATR and ATPR series provide True RMS outputs on distorted waveforms found on VFD and ...
NK Technologies AT/ATR-LS SERIES AC Current Transducers 800 - 1600 A
AT/ATR-LS Series Current Transducers combine a current transformer and signal conditioner into a single package. The large, easy-to-install split-core design allows for installation over existing conductors without the need to disconnect the load, even in applications where there are multiple conductors per phase. For new installations, the installation is just as easy. Just remove the top portion of the sensing ring, place the conductors inside, and snap the top back in place. The transducer uses two wires to connect to the power supply and the load, ...
NK Technologies ATPR “E-OUT” SERIESAC Current Transducers 2 - 200 A
ATPR Series AC Current Transducers produce a 0–5 or 0–10 VDC RMS output on distorted waveforms found in the output of variable frequency drives, phase angle fired heating controls and on linear loads in “noisy” power environments. The ATPR Series AC Current Transducers are available in split-core housing only.
DT Series DC Current Transducers provide a low cost way of measuring DC current in a small and easy-to- install housing. The series is stable at a wide range of temperatures. The single range design and the use of a common for the power supply and output signal provide a price competitive option in an international market. Similar in concept to the DLT current output sensors, this design produces your choice of 0–5 or 0–10 VDC to interface with controllers or data acquisition systems lacking the current signal capacity.
DT Series DC Current Transducers combine a Hall effect sensor and signal conditioner into a single package for use in DC current applications up to 400 A. The DT Series DC Current Transducers unipolar and bipolar models have jumper selectable current input ranges and industry standard 0–20 mA, 4–20 mA, 0–5 VDC or 0–10 VDC outputs. The DT Series DC Current Transducers are available in split-core or solid-core enclosures.
If you control or monitor electric powered loads, you need current switches. Monitor fans, pumps, lights, and heaters for proper operation. Current switches give positive feedback that the load is operating and are much easier to install than alternatives like pressure switches, optical sensors, or zero speed switches.
AS and ASX current switches combine a current sensor, signal conditioner, and limit alarm in a single package. AS1 series are well suited to automation systems of all kinds with their universal solid-state outputs and a wide frequency response. AS3 series have a high current output that works well with relay logic control schemes. ASX series combine the AS3 design with a built in adjustable time delay. All ...
NK TechnologiesASM Series Load Monitoring Switches are designed for overload, underload or operating window applications. This Self Calibrating Smart-Switch uses the actual load current to set the trip point.
Solid-Core: 1.5 - 150A
Split-Core: 2.8 - 150A
• Self-calibrating trip points • Over, under or over/under ...
The AS1 Series Compact Case Current Sensing Switches are a compact, inexpensive, easy-to-use ring which slips onto a conductor to give a solid-state contact for indication of current flow. Ideal for use in control panels, or wherever confirmation of current flow is desired, AS1 Series-CC current sensing switches are a cost-effective way to detect live conductors and see current flow to fans, heaters, pumps, lighting or other AC powered devices.
• Fixed 0.5A trip point • Long life solid-state output • No external power required • Normally open or normally closed output • 5 year warranty
The NK Technologies ASXP-MS and ASXP-LS Series Current Switches combine a current transformer and signal conditioner into a single package. The large, easy-to-install, split-core design allows for installation over existing conductors without the need to disconnect the load, even in applications where there are multiple conductors per phase. ASXP-MS series: The switch output is powered from the primary circuit ASXP-LS series: The switch output is externally powered
• Sense currents to 1600 A • Split-core for easy installation • SPDT relay output • Adjustable setpoint & delay • Status LED • DIN rail or ...
DS3 Series Current Sensing Switches combine a Hall effect sensor, signal conditioner and a limit alarm into a single package. The DS3 Series offers three jumper-selected current input ranges and frequency response from DC to 400 Hz. Available in a solid-core case with choice of relay or a universal solid-state output.
• DC & AC sensing • Relay or solid-state output • AC or DC powered • 3 kV isolation • Solid core • 5 year warranty
The AMPFlasher™ ACI Series Current Indicator is a compact, inexpensive, easy-to-use LED ring which slips onto a conductor to give a flashing indication of current flow. Ideal for use in control panels, or wherever confirmation of current flow is desired, AMPFlasher™ current indicators are a costeffective way to detect live conductors and see current flow to fans, heaters, pumps, lighting or other powered devices.
• Provides quick visual indication of current flow • Integral or remote LED • No external power required • Small size mounts easily on conductor • 5 year warranty
The VTR Series AC Voltage Transducers are high-performance True RMS transducers for sensing voltage in single- and three phase installations. Applicable on circuits of 120 V, 240 V, 480 V and 600 V, the VTR Series voltage transducers provide a fully isolated, 4–20 mA output proportional to rated voltage in sinusoidal situations.
The VTD Series Voltage Transducers are high-performance transducers for sensing voltage in DC powered installations. Applicable for use on circuits to 600 VDC, VTD voltage transducers provide fully isolated 0–5 VDC, 0–10 VDC, and 4–20 mA outputs proportional to rated nominal voltage in DC circuits.
The VTU series of voltage transducers provide very high accuracy and safety in a panel or DIN rail mounted housing. One sensor design can measure DC or AC circuit voltages to 1200 volts, and produce an analog signal directly proportional to the voltage connected.
The APS Series measures true power (HP or kW) on balanced loads. Ideal for mixing, grinding, machining and pumping applications where power measurement is needed, the APS Series includes a CT, voltage sensor and output signal conditioner in a single package designed for easy installation.
NK Technologies APT-TH series, Three-hole Power Transducer
The APT-TH Series Power Transducers monitor watt consumption of three phase loads. They provide an analog signal proportional to the active power consumed by the monitored load. The three current carrying conductors pass through the three windows of the top section and the matching voltage input at the terminals.
One-piece contruction, no external current transformers
DIN rail or panel mounted
LED Indicator for correct phase relationship match
AG SERIES Ground Fault (Earth Leakage) Detectors The NK Technologies AG Series Ground Fault Detectors help protect people, products, and processes from damage by ground fault conditions by monitoring all current-carrying conductors in grounded single- and three-phase delta or wye systems.
The NK Technologies AT Series AC Current Transducers combine a current transformer and signal conditioner into a single package. These current transducers have jumper-selectable current input ranges and industry standard 4–20 mA, 0–5 VDC or 0–10 VDC outputs. The AT Series AC Current Transducers are designed for application on ‘linear’ or sinusoidal AC loads and are available in a split-core case or two types of solid-core cases.
The ATS Series Current Sensors combine a current operated switch and transducer into a single package for use in AC current applications up to 1200 A. The large sensing window provides complete isolation between the primary circuit and the controls. The DIN rail mounting makes installation a breeze, and provides a very secure mount that is resistant to conductor movement.
NK Technologies ATP Series AC Current Transducers sense currents from 0–200 A and provide a proportional analog VDC or mA output. Externally powered by 120 VAC/DC or 24 VAC/DC, the ATP Series AC Current Transducers eliminate the need for costly power supplies or voltage rectifiers inside the control panel. Designed for motor control applications with standard sinusoidal waveforms, these transducers feature user selectable input ranges, a choice of outputs and split-core or solid-core cases.