Watson Smith Type 421 I/P Converter


Please be advised that this model has now been made obsolete by Watson Smith and it is therefore no longer available.

You will find below our suggestion for a suitable Watson Smith replacement unit. 

send_us_an_enquiry

Watson Smith Type 421

Specifications:

  • Input signal: 4-20mA (two wire)
  • Output: 0.2 to 1bar (3 to 15psig); minimum outlet pressure less than 15mbar (0.2psig). Also available 0.4 to 2 bars.
  • Air supply: Oil free, dry air, filtered to 5 microns; 1.5 to 3.5bar (20 to 50psig) or at least 0.7bar
    above maximum output pressure
  • Port size: 1/8” NPT female
  • Failure Mode: Faisafe (Signal falls to below 15mbar (0.2psig) when input signal fails)
Watson Smith Type 421


 

Suitable replacement

100x_100

In most cases the Watson Smith type 100X I/P converter is the most suitable replacement for the Type 421. The only major difference is in the shape of the unit itself. The Type 421 was designed to be mounted on DIN rail.

To help with this the type 100X can be fitted with a DIN rail adaptor (please contact us for more information). However we strongly advise to check the dimmensions prior to purchase.

 

send-us-enquiry-button

Are you looking for a new Watson Smith item, a replacement or just some advice? Not sure where to start? As the top UK distributor for Watson Smith we can help!

Just send us an enquiry or call us now on 01202 480 303 or email us at sales@coulton.com !

Datasheet

One Download

Watson Smith Type 421 Datasheet (148 KB)
 
 
 
 
Home Page
Products
Transmitters
Flowmeters
Switches
Signal Conditioners
Indicators
Controllers
Recorders
Valves and Accessories
Control Valves
Positioners
Converters, Manostats
Standard I/P
Failfreeze I/P
I/P for Harsh Env.
Watson Smith Type 122E
Repairs and Service
Information
Forum
Links
www.intergage.co.uk | Web Site Content Management