Electronic

DCT DIN RAIL mount current transducers

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

DCTR True RMS Measuring DIN RAIL mount current transducers NEW

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

CT5 and ACT Series

Our most popular current transducers. Select the ACT where a UL listed product is required. Many panel builders and contractors use these where an analog signal proportional to AC current is required.

• Described on pages 58 - 62 in catalog 901.
• ACT Series are UL and CUL Listed. NEW with more models.
• Electronic type
• Self powered except 4 to 20 mADC models.
• Models available from 1 ampere to 1500 amperes.
• Provides 1500 volts Ac isolation.
• Triple models are available. 3CT5 or the UL and CUL Listed 3ACT NEW with more models.

 MCT5 Series DIN Rail Mount Series

Same as CT5 in 1 inch thick DIN Rail-mount case.

• Very compact mounting.
• Saves mounting and connection time, easy to use.
• Output user selectable for 0 to 1 mADC, 0 to 5 VDC or 0 to 10 VDC, 4 to 20 mADC models also available.
• Described on page 66 of catalog 901.

 SCT Series Split Core Current Transducers

Split-core transformer and electronics in the same easy to use case. Available now. Request product bulletin.

• Very easy to use.
• Large window
• Excellent accuracy:
• Request product bulletin.

CTD Series — standard and large aperture

Similar to CT5 described in the above.

• Essentially CT5 current transducer and current transformer combined in the same case.
• Two aperture sizes available.
• Standard described on page 68 of catalog 901.
• Request bulletin for the large aperture version.
• Saves installation time.
• Save panel space.

 CTR True RMS Measuring Current Transducers

These current transducers provide a highly accurate analog output proportional to the RMS value of the current input. Use these true RMS measuring trans-ducers when harmonic content or distortion exists.

• Available with split core current transformers for full-scale currents of 5 to 1000 amperes. CTRS
• Described on pages 63 and 64 of catalog 901
• Electronic, True RMS Measuring.
• Provides 1500 VAC isolation.

 CT7 Series Low Current DC

DC current transducer provides an analog output directly proportional to the DC input.

• Described on page 83 of catalog 901.
• For low current measurements (0.1 to 20A).
• Bi-directional.
• Tracks wave shape.
• Provides 1500 volts AC isolation.

CT8 Series Low Current True RMS Measuring

True rms measuring current transducer provides an analog output proportional to the effective value of the input current. May be used on AC, variable frequency, or DC.

• Described on page 85 of catalog 901.
• True RMS measuring.
• Use for low current measurements (0.1 to 20 amperes).
• Provides 1500 volts AC isolation.

VT7 Series Shunt Isolators

For use with existing millivolt shunts. These amplify the voltage drop across the shunt and provide an isolated, analog output proportional to the millivolt input.

• Described on page 101 of catalog 901.
• Bi-directional.
• Tracks wave shape.
• Provides 1500 volts AC isolation.

VT8 Series Shunt Isolator

For use with existing millivolt shunts. These provide an isolated DC analog output proportional to the RMS value of the input. Not in catalog — ask.

• True rms measuring.
• Wide frequency range.
• Provide 1500 volts AC isolation.

Hall Effect

 CTL Series Open Loop Current Transducers

Wide range of transducers available for monitoring 35 to 40,000 amperes. These high quality Hall Effect current transducers are used for monitoring DC or AC current. They are frequently used to monitor torque delivered by DC motors.

• Described on page 71 - 77 in catalog 901.
• Additional product bulletins are available.
• Current measurement from DC through 1 kHz.
• Flat frequency response from DC to 5 kHz.
• Transient response better than 50 microseconds.
• Split core models available from the 100- ampere model to the 40,000-ampere model.

 CTF and CTFB Series Closed Loop

Precise, electronic Hall effect current transducers are ideal for monitoring DC, AC, pulse current, and variable frequency current. These closed loop or feedback style hall effect current transducers provide 0.1% linearity.

• Described on page 78 of catalog 901.
• Additional product bulletins available.
• Very fast transient response.
• Lower cost.

CTG Open Loop High output Series

High output, low excitation current Hall effect current transducers built for special applications.

• Described on page 81 of catalog 901.
• Built to meet specific applications.
• Reasonable cost.

 CTA Series Signal Conditioners

Signal conditioners are available for the CTL and the CTF series of Hall effect current transducers. Both instantaneous and true rms measuring signal conditioners are available.

• Described on catalog 901pages 71 - 77 for the CTL series and page 80 for the CTF series.
• Suitable for monitoring or control purposes.
• High linearity.
• Supplies the excitation to the Hall effect current transducer and amplifies the output.

  CURRENT TRANSFORMERS

 CTX Split Core Current Transformer

These highly linear split core current transformers are used with several OSI transducers and instruments including: DM2 Demand Meter, DLM Digital Load Monitor, WL40R watt-hour transducers, and the CTR true rms measuring currenttransducers.

• Described on page 87 in catalog 901.
• Inexpensive.
• Internally loaded for voltage output.
• Output voltage limited.
• Color-coded for current range.
• Provides excellent accuracy.
• Very easy to install.

VOLTAGE TRANSDUCERS

DVT DIN RAIL mount voltage transducers NEW

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

DVTR DIN RAIL mount true RMS measuring voltage transducers

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

VT & AVT Series
Most popular voltage transducer sold by OSI.

• Described on pages 92 & 94 of catalog 901.
• Electronic type.
• Self powered (Except 4 to 20 mADC models.)
• Provides 1500 volts AC isolation.
• Triple models available. See page 94 in catalog 901. 3VT or the UL and CUL Listed versions 3AVT.
• AVT series are UL Listed. Bulletin available. Recently Expanded with more models AVT or the triple 3AVT.
• Inexpensive.

 MVT Series

Same as the VT series above but in a 1 inch thick DIN Rail mount package.

• Described on page 97 in catalog 901.
• Saves space.
• Easy to mount and connect.
• Output selectable for 0 to 1 mADC, 0 to 5 volts, or 0 to 10 volts.
• Inexpensive.

 VTR Series True RMS Measuring

True rms voltage transducer provides an analog output proportional to the effective voltage input.

• Described on page 96 in catalog 901.
• True rms measuring.
• Use where harmonic distortion exists.
• Electronic type.

 VT7 Series

Use for monitoring DC voltage where isolation is required. Provides instantaneous output proportional to the input. Works on AC or DC. If DC input, then DC output. If AC input, then AC output. If you plan to use the VT7 on AC, then use the peak value of the AC voltage for the voltage rating on the VT7.

• Described on page 99 in catalog 901.
• Isolated output.
• DC to 10-kilohertz frequency range.
• NOW AC OR DC POWERED 85 to 265 volts AC or DC.
• Some models available for 4 or 5 kilovolts — Ask.
• Shunt isolators available.

 VT8 Series True RMS Measuring

Used for monitoring AC voltage where the frequency range is outside that which a transformer can handle. These provide very fast transient response.

• Described on page 102 in catalog 901.
• Electronic type
• Isolated DC output proportional to the effective value of the input.
• Wide frequency range — DC to 10 kilohertz.
• NOW AC OR DC POWERED 85 to 265 volts AC or DC.

Power Transducers

DW5 DIN RAIL mount watt transducers NEW

• CE and CSA US
• Product literature available. (Get acrobat file.)
• Electronic type.
• DIN Rail Mount.

 GW5 and AGW Series Watt Transducers

These are a high accuracy, electronic watt transducer. Use where high accuracy power readings are required. Applications include utility monitoring, power control, and power monitoring over a wide dynamic range.

• Described on page 11 - 14 in catalog 901.
• Electronic, high accuracy type.
• Available in 50 or 60 Hz models.
• AGW models are UL Listed.

 PC5 & PC4 Series

Long a standard of excellence from Ohio Semitronics, Inc. Many of these Hall effect watt transducers have been in continuous use for twenty years or more and are still performing within their accuracy rating. The PC5 watt transducers are highly recommended for use where frequency stability is lacking, high harmonics are present, or chopped current wave shapes exist. Recommended for monitoring loads controlled by phase angle-fired SCR controllers.

• PC5’s for 50 or 60 hertz. PC5’s are describes on pages 6 - 10 in catalog 901.
• PC4’s for 400 hertz. Request product bulletin for PC4’s.
• Hall effect type.
• Excellent accuracy.
• Excellent for distorted current & chopped current.
• Simple, reliable construction.
• Proven long life.

 PC8 Series

These DC to 400 hertz watt transducers are used world wide for monitoring DC power.

• Described on page 15 in catalog 901.
• Hall effect type.
• For DC or variable frequency applications.
• Single element only. If your application requires two or three elements use the P series, which is described next.

P Series

Designed specifically for variable frequency applications either single phase or polyphase.

• Described on page 18 in catalog 901.
• DC and 5 to 500 hertz frequency range.
• Hall effect type.
• Available in 1, 2, or 3 element versions.
• Low current models available.
• High current models available with split core current sensors.

 MT Series Multipliers

The MT series multipliers are designed to utilize existing signals that are proportional to the actual current and voltage delivered to a load. A typical application is in systems where shunts and perhaps voltage transducers are already in place.

• Described on page 22 in catalog 901.
• Excellent accuracy.
• Electronic, analog multiplier.
• Isolated output.
• Use with existing shunt or other signals.

GH and AGH Series

High accuracy combination watt and watt-hour transducer may be used for tariff purposes, control, energy management, or as a sensor in a control system. The AGH is UL Listed.

• GH described on page 28 in catalog 901.
• AGH UL Listed version (Get Acrobat file).
• High accuracy electronic transducer based on the GW5 watt transducer.
• Available in 50 or 60 hertz models (AGH 60 hertz only).

 W Series

Based on our PC5 series watt transducer and VFC integrators, these watt-hour transducers provide outputs for watts and watt-hours. Applications are similar to those listed for the PC5 series watt transducers.

• Described on page 23 in catalog 901.
• Hall effect type.
• Excellent accuracy.
• Excellent where high harmonic contents or chopped current waveforms exists.
• Simple construction with proven long life.

SWH Series

Split core integrated current transformer / watt-hour transducer in the same case.

• Inexpensive
• Very easy to install
• LED indication of proper installation

 WL Series

These inexpensive watt-hour transducers provide excellent accuracy. The flat pack design and low cost has made this series very popular with energy management and sub-metering companies.

• Described on pages 32 - 34 in catalog 901.
• For energy management applications.
• For tenet sub-metering.
• WL40 supplied with split core CTs.
• WL41 for use with 1 ampere secondary CTs request product bulletin on the WL41. (No PDF available.  Same as WL45R except for 1 ampere input from current transformers.)
• WL45 for use with 5 ampere secondary CTs.

See MULTIPLE PARAMETER Transducers also.

 GV5 Series

High accuracy, electronic transducer used where precision is required. Applications include power factor control and reactive power monitoring over a wide dynamic range.

• Described on page 38 in catalog 901.
• Electronic Type similar to GW5 watt transducers.
• 50 and 60 hertz models available.
• Available in single and polyphase models.

 VAR5 Series

These are available for three phase applications only. The GV5 series described above is the preferred series. Use the VAR5 series where frequency regulation is poor or distorted wave shapes exist. Please consult factory before specifying the VAR5 transducers.

• Described on page 35 in catalog 901.
• Hall effect type.
• Similar to PC5 watt transducers.
• Not frequency sensitive.
• Check with factory before ordering.

VAR-hour transducers provide a pulse or contact closure output for reactive energy in VAR-hours or kilo-VAR-hours.

 VGH Series

• Based on GV5 VAR transducer
• Described on page 40 in catalog 901.

These are transducers that provide outputs proportional to two or more electrical parameters.

The PTB board level transducer with multiple outputs has become very popular. The DSP digital transducer has also been gaining in popularity.

DMT Series of DIN Rail Mount Multifunction Programmable Transducers.

• MODBUS protocol available (DMT-1000).
• LONWORKS interface available (DMT-1000L).
• Simultaneous measurement of several variables.
• Universal AC/DC power supply 85 to 230 volts AC or DC
• User programmable.
• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• DIN Rail Mount.

 DSP Digital Signal Processing Transducer

Highly accurate electronic transducer provides RS-422 interface that communicates value of true rms current and true rms voltage for each phase, power for each phase and total power, and frequency. Connect direct to RS-422 board in computer or use RS-422 to RS-232 adapter and go straight into COM port on PC.

• Described on page 52 in catalog 901.
• True rms Voltage and Current each phase
• True power each phase.
• Total power.
• Frequency.
• Software available from OSI.
• Works with LabVIEW. (LabVIEW driver available)
• Inexpensive compared to individual cost of transducers.

 PTB Board Level Transducer Series

Board level transducer provides analog output signals proportional to voltage, current, power, VA, power factor and pulses for watt-hours. This is a very economical choice where multiple analog signals are required.

• Described on page 48 in catalog 901.
• True rms Voltage and Current each phase.
• Total power
• Total VA optional.
• Power factor optional.
• Watt-hours optional.
• Excellent accuracy.
• Saves panel space.

 PC20 Series of watt, VA, Power Factor Transducers

Popular PC20 series provides analog outputs proportional to power, apparent power, and power factor where power factor is determined from the ratio or power to apparent power. In this way, the power factor output is linear with power factor and not phase angle.

• Described on page 44 in catalog 901.
• May be used where distorted current wave shapes exist.
• Wide frequency range of 48 to 425 hertz.
• Electronic transducer.
• Excellent accuracy.

 GWV5 Series Watt and VAR Transducer

These are a high accuracy combination watt and VAR transducer. Use wherever both watt and VAR readings are required.

• Described on page 42 in catalog 901.
• Electronic type.
• High accuracy.
• Available in 50 or 60 hertz models.

 WVL Series Watt-hour and VAR-hour Transducer

Inexpensive series of watt-hour and VAR-hour transducers provide excellent accuracy. Easy to mount board level design coupled with low cost make these popular with energy management companies.

• Product bulletin available (get pdf).
• Inexpensive.
• High accuracy.
• Provide relay contact closure outputs for both watt-hours and VAR-hours.

PHASE ANGLE TRANSDUCER

DPA Phase Angle Transducers

Use this transducer to measure the phase angle difference between a current input and voltage input. The output is linear with the phase angle shift.

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

 PF5 Series

The PF5 series power factor (Phase Angle) transducers provide an analog output directly proportional to the phase angle shift between voltage and current. Models are available for single or three phase circuits. See Multiple Output Transducers for true Power Factor Transducers.

• Described on page 106 in catalog 901.
• Electronic type.
• Output indicates lead or lag.

DPF Power Factor Transducer

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

FREQUENCY TRANSDUCERS

Frequency transducers provide an analog output proportional to frequency.

DFD Differential Frequency Transducer

Use this series for comparing frequencies of two different power systems.

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

DFT narrow range Frequency Transducers

Use this series for measuring standard power frequencies.

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

DFTA Wide Frequency Range Frequency Transducers

Use this series for measuring frequency over a wide range such as 10 to 1000 Hertz.

• CE and CSA US
• Product literature available. (Print out acrobat file.)
• Electronic type.
• 4000-volt dielectric test.
• DIN Rail Mount.

AFT UL and CUL Listed

• Narrow frequency span models available.
• 50, 60. And 400 hertz models available.
• Wide frequency span models available.
• UL and CUL Listed.
• Isolated output.

FT Series

The FT series frequency transducers provide an analog output signal proportional to a narrow frequency span.

• Described on page 104 in catalog 901.
• Narrow frequency span.
• Electronic type.
• Isolated output.
• 50, 60, or 400 hertz models available.

 FTA Series

The FTA series frequency transducers provide an analog output signal proportional to a wide frequency span.

• Described on page 105 in catalog 901.
• Wide frequency span.
• Electronic type.
• Isolated output.

INTEGRATORS

Integrators accept an analog input signal and integrate that signal with respect to time. They provide a pulse or relay contact closure output where each pulse represents so much integrated quantity — watt-hours or ampere-hours.

VFC Series

The VFC (Voltage to Frequency Converters) are precision integrators. They may be used with a watt transducer to provide a pulse output for watt-hours, or with a current transducer to provide a pulse output for ampere hours, or any type of analog transducer to provide a pulse output for a time integrated quantity. Outputs available include user choice of relay contact closure, TTL 5-volt pulse, or open collector from a transistor.

• Described on page 108 in catalog 901.
• Electronic type.
• Excellent accuracy.
• Isolated output.

 PA Series

Process accumulator will accept analog signal and provide an eight digit reading of the accumulated time integrated quantity.

• Described on page 109 in catalog 109.
• Battery protected display. Will not lose count during power failure.
• Factor calibration to meet customer requirement.
• Use with watt transducer, current transducer, shunts, or any transducer that provides a linear analog signal output.

SIGNAL CONDITIONERS

Signal conditioners are used to convert one type of analog signal to another. For example a signal conditioner accepts a 0 to 1 mADC input and provides a 4 to 20 mADC output.

 SG and MSG Process Signal Conditioners

The SG and MSG series of signal conditioners provide an isolated analog signal output proportional to the analog input. The SG’s are in our standard metal can while the MSG’s are in a 1 inch thick DIN Rail mount plastic case.

• SG described on page 112, MSG described on page 113 of catalog 901.
• Provides isolation input to output.
• Converts one type analog to another.
• Can be used to provide non-isolated 4 to 20 to as an isolated 4 to 20 mADC.
• Large selection of models available.

 SCE Signal Converters

The SCE signal converters accept a low level DC voltage or current and convert it to a 4 to 20 mADC signal. These do not provide isolation.

• Product bulletin available.
• High linearity.
• Does not provide isolation. Use SG or MSG if isolation is required.
• No PDF file available.

 LRB Precision Load Resistors

Use these precision load resistors to convert a low-level analog current signal to a voltage signal.

• For use with 0 to 1 mADC outputs and 4 to 20 mADC outputs.
• Described on page 108 in catalog 901.
• 0.1% accuracy, 0.005% temperature coefficient.
• Easy to use.
• Specials are normal. Call us with your requirement.

PI Low Level Converter

Converts 4 to 20 mADC to either a 0 to 1 volt or a 0 to 1 mADC signal.

• Product bulletin available.
• Self powered.
• No isolation input to output.
• Easy to use.
• Inexpensive.
• 0.25% accuracy.
• No PDF file available.

 CRD-005 Programmable Set Point Relay

Accepts 0 to 1 mADC or 0 to 10-volt DC input.

• Described on page 69 in catalog 901.
• Programmable for voltage or current input.
• Programmable for trip point.
• Programmable as over or under relay.
• Easy to use.

CRD-020 Programmable Set Point Relay

Accepts AC current input.

• Described on page 70 in catalog 901.
• Programmable for 0 to 5, 10, 15, or 20 amperes full scale.
• May be used with current transformers.
• Programmable for trip point.
• Programmable as over or under relay.
• Easy to use.

INSTRUMENTATION

 LOAD MONITORS

DLM Digital Load Monitors

Multi-function panel meter displays true rms voltage on each phase, true rms current on each phase, frequency, total power, and accumulated kilowatt hours. The accompanying software permits the user to display the data on a computer screen and to take snapshots of the data manually or automatically. The snapshot data is stored in a spreadsheet format and may be printed or transferred to Excel or other spreadsheet.

• Described on pages 54 - 57 in catalog 901.
• Microprocessor based.
• Measures volts, amperes, watts, kWh, VARS, VAR hours, demand, power factor and frequency.
• Provides RS-422 interface.
• Up to 32 Load Monitors may be on the same RS-422 line.
• Software available for Windows 3.1, WIN95 or WIN98.
• LABview driver available.
• Very easy to use.
• Very inexpensive.

DEMAND METER

 DM2 Demand Meter

Microprocessor based demand meter incorporates a wide variety of features normally found on larger meters. Split core current transformers are supplied with the DM2 to minimize installation time and cost. These are ideal for tenant sub-metering and industrial monitoring of individual processes, zones, or an entire facility.

• Get Acrobat file.
• UL and CUL Listed
• Thousands in use.
• High Accuracy with split-core CT’s.
• Five year warranty.
• Non-volatile memory.
• 8 digit local display
• RS-422 interface.
• Up to 32 DM2’s on single RS-422 line.

WATT AND WATT-HOUR METERS

 WH50 Series of Watt-hour Meters

Electronic watt and watt-hour meter offers many options and highly accurate measurement of power and energy.

• Discontinued in the OSI catalog 901.
• Limited availability. Contact factory.
• Dual set point 4.5 digit wattmeter.
• 8 digit watt-hour accumulator.
• Electronic type digital meter.
• Many options available.

 WH30 Watt and Watt-hour Meters

Long a standard of excellence from Ohio Semitronics, Inc. These Hall effect watt and watt-hour meters have been performing for decades at industrial sites.

• Discontinued in the OSI catalog 901.
• Limited availability. Contact factory.
• 48 to 70 hertz, 400 hertz versions available.
• Excellent accuracy everywhere high harmonics exist.
• Hall effect type wattmeter.
• Bi-directional models available.
• Many options available — Call us for a quotation.

WH70 Series DC Watt and Watt-hour Meters

Long a standard of excellence from Ohio Semitronics, Inc. These Hall effect watt and watt-hour meters have been performing for decades at industrial sites.

• Discontinued in the OSI catalog 901.
• Limited availability. Contact factory.
• Product bulletin available.
• DC to 100 hertz.
• Hall effect type wattmeter.
• Split core current transducers available for full-scale currents of 100 to 40,000 amperes.
• Bi-directional models available.
• Many options available — Call us for a quotation.

 AMPERE HOUR METER

 AH70 Ampere Hour Meters

Uses for the AH70 series ampere hour meters include monitoring electrolytic operations as found in copper mines or plating operations, battery monitoring, mine operations (determining DC motor torque and operator efficiency), and appliance testing.

• Discontinued in the OSI catalog 901.
• Limited availability. Contact factory.
• Product bulletin available.
• Hall effect type or electronic type.
• Non-contact hall effect current sensing available for current of 35 to 40,000 amperes. Split core sensors available for 100 to 40,000 amperes.
• Bi-directional models available.
• Shunt based models available.
• Same format as our ever-popular WH30 watt and watt-hour meters.
• Many options available.
• Call us for a quotation.

 OPTIONS FOR WH AND AH METERS

Options Available for WH and AH Series Instruments

• No load offset control (tare).
• Split core current sensors for AC and DC.
• Joule meters (energy) and Coulombmeters (ampere-second) available.
• Preset counters.
• Analog outputs for watt-hours or ampere-hours.
• RS-232 available. (Check out the DLM Digital Load Monitors -- RS-422 is standard and an inexpensive RS-422 to RS-232 converter is available — Much less expensive.)
• Alarm limits.

RESALE ITEMS

Current Transformers

In addition to the current transformers manufactured by Ohio Semitronics, Inc., OSI carries a complete line of solid and split core transformers. Most of these transformers are UL and CUL Recognized.

• Described on pages 88 - 90 in catalog 901.
• Split cores available.
• Instrument grade available.
• If you can’t find what you require, please call us, or e-mail us at sales@omnicontrols.com.
• Omni Controls, Inc can supply current transformers to meet your indoor requirements.

Panel Meters

OSI carries a small selection of panel meters that may be used with OSI transducers.

• Described on 110 in catalog 901.
• Many more available including 4 to 20 loop powered meters. Please call us.

Counters

These are for use with OSI watt-hour transducers or the VFC integrators.

• Described on page 110 in catalog 901.
• Battery powered.
• 8 digit.
• User can configure for remote reset.

Fuses and Fuse Blocks

• Described on page 111 in catalog 901.
• Required in some installations of transducers.

Disconnect Switches

Allows user to safely install or remove transducers or meters in the current transformer circuit.

• Described on page 111 in catalog 901.
• Designed to make before break in current transformer circuit.