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Products » Catalogue index » 107 Series Instruments


107 Series signal conditioners

Available for spares and replacements for, and additions to, existing applications.
The same functions are available in the B12 Series and slimline DIN rail mounting C16 Series


Module size 100mm high x 63mm wide x 95mm* deep (*add 22mm for units with front panel control). DIN rail mounting is available. Modules are a plug in type which permits pre-wiring of base section. Current input types have a no break signal loop facility.

General info on 107 series instrumentation

107 Series General information


Signal converter
Signal inverter
Set-point generator
Bridge amplifier
2-wire trip amplifier
Analogue to frequency


Square root extractor
3/2 law
5/2 law
Linear power supplies
General purpose power   supplies -switched mode
Frequency to analogue

Rate limiter
Rate of change signal converter

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(resistance & RTD inputs)

B12 Equivalent

Converts inputs from resistance transducers e.g. variable resistances, potentiometers, resistance temperature detectors (RTD), platinum resistance thermometers (PRT), into standard voltage or current process signals. Input and output are not isolated from each other.




Signal converter informationSignal converter data sheet


Signal converter user guide Signal converter user guide

Set Point


Also see

B12 Equivalent

These units provide a current or voltage output, the magnitude of which is controlled either by:
• a front panel mounted control (adjustable type).
• a remote set-point with the set-point potentiometer and dial supplied loose for remote mounting e.g. in a control panel or enclosure door or
• a fixed output which is internally set to the level required.




Remote set-point






Set-point generator informationSet-point generator data sheet

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Bridge Amplifier

B12 Equivalent

This unit accepts voltage signals from 0-10mV to 0-100mV from bridge type transducers (e.g. load cells). The gain is user selectable. Optionally the unit can be calibrated for voltages from 0-1V to 0-10V. An isolated and stabilised transducer power supply is provided.




Bridge amplifier information Bridge amplifier data sheet


Bridge amplifier user guideBridge amplifier user guide

Two-wire Trip Amplifier

B12 Equivalent

This unit requires no external supply but derives its power from the 4-20mA input signal. A normally open contact and a normally closed contact are provided.




Loop-powered trip amplifier information 2 wire trip amplifier data sheet

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Signal Isolator

B12 Equivalents

This unit may be used as a signal repeater, conditioner, converter and provides isolation between the input and output signals. The unit can convert a wide range of signals: current to current, current to voltage, voltage to voltage, voltage to current. Also available as a signal inverter e.g. a 4-20mA input giving 20-4mA output.




Signal isolator/booster information Signal isolator data sheet

Analogue to

B12 Equivalent

Otherwise known as an integrator when combined with a counter, this unit will convert a voltage or current input signal into pulses with respect to time; the pulse rate being proportional to the magnitude of the input signal. Output may be pulse, open collector or for an electro-mechanical counter.




Analogue to frequency converter / integrator information Analogue to frequency converter data sheet

Summator /
averager/ subtractor

B12 Equivalents

This unit will sum together - or subtract - up to three voltage or current input signals. The output signal may be current or voltage and will be proportional to the sum or difference of the input signals. This unit will perform an averaging function with equal input ranges. See 112-6A for number of inputs greater than three.

2 Input Version


3 Input Version



Analogue summator / subtractor information Summator / subtractor data sheet

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Signal Converter
Square Root
3/2 Law
5/2 Law

B12 Equivalents

Provides a voltage or current signal output which is proportional to one of the following functions:
• Square root of the input signal (e.g. for DP transmitter)
• 3/2 law (e.g. for flowrate measurements from flume or weir)
• 5/2 law (e.g. for flowrate measurements form 'V' Notch weir)
Input and output signals may be current or voltage and the unit will convert to signals of different ranges and types. The unit provides an optional transducer excitation supply.

Square Root Extractor


3/2 Law


5/2 Law



Square root extractor information Square root extractor data sheet


Square root extractor user guideSquare root extractor user guide

Current loop
Power Supplies

Rising Output Characteristic - The voltage output of this unit rises with the load current. This enables loads to be driven in series with large resistances such as transmission lines or through zener barriers. 24-32V & 36-48V types available.




Power supply data sheet

General purpose
Power Supplies
(switched mode)

A range of general purpose instrumentation power supplies for powering two-wire transmitters operating on 4-20mA signals or powering 24V signal conditioning modules.
• Universal input supply 85-260VAC
• High-efficiency, cool running

Single Output - available in the following versions: 24V @ 100mA, 36V @ 50mA
& 48V @ 50mA




Dual Output - 2 x 24 V @ 40mA



Single output power supplies informationPower supply data sheet Both types

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to Analogue

The 107-10B is no longer available.
Please see alternatives:-

• B12-10C
• C16-10

The 107-10B provides an output current or voltage which is proportional to the frequency of alternating voltage or pulse input signal. Accepts input frequency ranges from less than 0-1Hz to 0-10Khz. This instrument has many uses in applications including flowmetering and rotational measurements. Optional PC software enables range changing, e.g. to suit a turbine meter replacement, and optimisation of digital filtering to suit site conditions.




Frequency to analogue (frequency to current or voltage) current converter information Frequency to analogue data sheet


Frequency to analogue converter user guideFrequency to analogue user guide


Frequency to analogue converter programming software download download configuration software


B12 Equivalent

Provides an analogue output signal proportional to the multiplication of two analogue input signals. The input signals may be of differing types e.g. current / voltage, true / raised zero, etc.
NB The multiplier can also be made to function as a squarer.




Analogue multiplier / divider informationMultiplier data sheet


Multiplier user guideMultiplier user guide


Rate Limiter

B12 Equivalents

A range of instruments providing functions which control the rate of change in the output signal for a change in input signal. These units may also provide signal conversion. The time constant is adjustable by a front panel mounted dial. Times to FSD are calibrated to order and are typically available from 0-60s up to 0-120s.


Information on special signal converters providing rate limiting functions Rate limiter data sheet for all types


Slow Up Fast Down Response Unit: the response curve is an exponential and the time to steady state output is the same for any magnitude of change of a rising input signal. However for a negative going change in input signal, the output response is virtually instant.




Rate Limiter: the response curve is linear giving a ramp with a fixed rate of change. The effect on the output is a response time proportional to the magnitude of the input signal change.




Slow up, Slow Down Response Unit: the reponse curve is similar to the 107-17 /0 but the rate of change is also controlled for negative going input signals



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Rate of Change

B12 Equivalent

This unit provides an output signal, with magnitude proportional to the rate of change of the input signal.




Rate of change signal converter information Rate of change monitor data sheet


Rate of Change Monitor user guideRate of change monitor user guide