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Watson Smith - Controlling Pressure Worldwide
Type 100/101X Electro Mechanical Converters
Current to Pressure (I/P) and Voltage to Pressure (E/P)


 Reliable, rugged
 Proportional I/P and E/P converters
 Suitable for a wide range of applications
 IP65 environmental protection General Description

The 100/101X series offers a range of reliable instruments and many thousands of units are installed worldwide each year. The units are uncomplicated by design, making use of electromagnetic force balance technology with flapper valve control and potentiometer adjustment.

Type 100/100X Electro Mechanical Converter

Functional Symbol

Technical Data
*Output Signal See product selector
*Air Supply Oil free, dry air, filtered to 5 microns; at least 0.7bar above maximum required output pressure range
*Flow Capacity Up to 300Nl/min (10scfm)
*Air Consumption < 4bar: 0.85 l/min (0.03scfm) typical
> 4bar: 1.75 l/min (0.06scfm) typical
*Response Time (dependent on input and output pressure) < 2bar/30psig: less than 0.5 seconds for 10-90% step change
> 2bar/30psig: 2 seconds for 10-90% step change
*Total Error +/-0.5% of span (typical, independent error includes the combined effect of non-linearity, hysteresis, deadzone and repeatability)
*Temperature Effect Typically better than 0.1% span/°C for span and zero over operating range
*Supply Sensistivity Better than 0.025% span output change per % supply pressure change
*Connections 1/4" NPT standard (others available on request)
*Operating Temperature -20°C to +70°C
*IP Rating IP65 in normal operation
*Electromagnetic Compatibility This is a passive electromagnetic instrument and is unaffected by interfering high frequency signals
*Material of Construction Zinc diecasting passivated and epoxy paint, nitrile diaphragms, stainless steel/nylon flapper nozzle and supply valve
*Mass 1500g
*Mounting Position Integral surface mounting bracket provided for preferred vertical mounting. 50mm pipe mounting kit available
*Electrical Signal See product selector
*Failure Mode Signal falls to bleed pressure when electrical supply fails
*Connections 30mm square connector DIN 43650 provided, mountable in four directions (alternative connections available)


An intrinsically safe 100X model certified to CENELEC EN50 020 (BS 5501 part 7) EEx ia llC T4 is available (Installation with these models must comply with information given in BS 5345, parts 1 and 4)
All instruments are tested on the Watson Smith Automatic Testing System and an individual test certificate is provided at no extra charge. Each unit is tested for linearity, hysteresis, total error, settling error, over pressure, air consumption, response time, calibration, insulation, start-up current, supply sensitivity and voltage load.

Please note, this product is not yet RoHS compliant.



Ordering Information

400100R 100X/4-20MA/3-15PSI/1/4"NPT 2 WIRE DEVICE
400104R 100X/4-20MA/3-15PSI/1/4"NPT IP03520 PLUG/2 WIRE DEVICE
400700R 100X/4-20MA/3-27PSI/1/4"NPT 2 WIRE DEVICE
400704R 100X/4-20MA/3-27PSI/1/4"NPT IP03520/2 WIRE DEVICE
402100R 100X/4-20MA/0.2-1BAR/1/4"NPT 2 WIRE DEVICE
422100R 100X/0-20MA/0.2-1BAR1/4"NPT 2 WIRE DEVICE
440100R 100X/1-10V/3-15PSI/1/4"NPT 2 WIRE DEVICE
442100R 100X/1-10V/0.2-1BAR/1/4"NPT 2 WIRE DEVICE
492100R 100X/4-20MA/0.2-1BAR/1/4"NPT ATEX IS/2 WIRE DEVICE
500400R 101X/0-60MA/2-120PSI/1/4"NPT 2 WIRE DEVICE
500404R 101X/0-60MA/2-120PSI/1/4"NPT IP03520 PLUG/2 WIRE DEVICE
502400R 101X/0-60MA/0.14-8BAR/1/4"NPT 2 WIRE DEVICE
540400R 101X/1-10V/2-120PSI/1/4"NPT 2 WIRE DEVICE
542400R 101X/1-10V/0.14-8BAR/1/4"NPT 2 WIRE DEVICE
552400R 101XA/1-5V/0.14-8BAR/1/4"NPT 3 WIRE DEVICE
560400R 101XA/1-10V/2-120PSI/1/4"NPT 3 WIRE DEVICE
562400R 101XA/1-10V/0.14-8BAR/1/4"NPT 3 WIRE DEVICE
570400R 101XA/4-20MA/2-120PSI/1/4"NPT 3 WIRE DEVICE
572400R 101XA/4-20MA/0.14-8BAR/1/4"NPT 3 WIRE DEVICE

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