Dag Process Instruments Pvt. Ltd.

Flameproof Pressure Switches

DAG Pressure switches are diaphragm operated, fixed differential type. Diaphragm movement is transferred to an SPDT switch, which gives (NO-NC-COM) change-over contacts. A counteracting spring is used to achieve the required settable range. Set point adjustment can be done internally using a spanner. Turning in the adjuster (from right to left) increases the pressure setting & vice-versa. Calibration has to be done against a Pressure gauge. (We do not provide an indicating scale due to its high inaccuracy, aging effect & believe that safety settings should be set against a test gauge only).

Weatherproof Pressure Switches
  
DAG Pressure switches are diaphragm operated, fixed differential type. Diaphragm movement is transferred to an SPDT switch, which gives (NO-NC-COM) change-over contacts. A counteracting spring is used to achieve the required settable range. Set point adjustment can be done internally using a 16mm spanner. Turning in the adjuster (from right to left) increases the pressure setting & vice-versa. Calibration has to be done against a Pressure gauge. (We do not provide an indicating scale due to its high inaccuracy & believe that safety settings should be set against a test gauge only).

Electronic Pressure Switches

DAG Pressure switch carries a Relay which gives (NO-NC-COM) change-over contacts. Turning in the Electronic adjuster (from right to left) increases the pressure setting & vice-versa. An Electronic adjustment is provided to facilitate Differential adjustment. Calibration has to be done against a Pressure gauge / Manometer

 Industrial Pressure Switch - Adjustable Differential
 

DPIS Series pressure switches are usually used with fluorinated refrigerants to control the pressure of compressor in refrigeration systems. It can also be used in air oil and water. Internal Microswitch ensures reliable switching. It is provided with a standard Mounting Bracket.

Top Mounted Level Switches
  
The Float / Displacer (attached to a load spring) looses weight due to buoyancy, thus moves up and down with Rise / Fall of liquid level. Rise in liquid level moves float upwards which carries a Magnetic Sleeve attached to a connecting link upwards inside process seal pipe. When this Magnetic sleeve enters Permanent Magnet’s flux zone magnet swings towards seal pipe. This movement of magnet Actuates an SPDT (NO-COM-NC) microswitch and vice-a-versa action on liquid level falls.

 
 
External Cage Level Switches
  
The Float / Displacer (attached to a load spring) looses weight due to buoyancy, thus moves up and down with Rise / Fall of liquid level. Rise in liquid level moves float upwards which carries a Magnetic Sleeve attached to a connecting link upwards inside process seal pipe. When this Magnetic sleeve enters Permanent Magnet’s flux zone magnet swings towards seal pipe. This movement of magnet Actuates an SPDT (NO-COM-NC) microswitch and vice-a-versa action on liquid level falls.

 
 
Side Mounted Level Switches
  
The Float looses weight due to buoyancy, thus moves up and down with Rise / Fall of liquid level. The Float extension encloses a bar magnet which retards another bar magnet inside the housing. This movement of the magnet actuates a Microswitch (SPDT, NO-COM-NC) and vice-versa action on falling liquid level. Process Connection flange is an SS-316 or SS-304.

 
 
Mini Side Mounted Level Switches
  
The Float looses weight due to buoyancy, thus moves up and down with Rise / Fall of liquid level. The Float extension encloses a bar magnet which actuates a Reed Switch (SPST) and vice-versa action on Rising/Falling liquid level. Contacts are made with rise in level and broken with fall, when installed in the orientation as shown in the picture. This logic can be changed by installing the switch upside-down. Standard Process Connection is screwed ¼"BSPM accompanied with a hex. locknut and PTFE washer. Installation will be internally on tank wall. Alternatively a plate flange can be provided for external installation, minimum 1½" size.

Globe Type Flow Switches (Plug Type)
  
DAG Flow switches are Globe Body Design used to detect Flow / No-Flow condition in a flow line. With sufficient Differential Pressure upstream and downstream of a calibrated Flow Plug; fluid flow is established. Increase in fluid flow moves the Flow Plug upwards which carries a Magnetic Sleeve attached through a Connecting Link, upwards inside a process seal pipe. When this Magnetic Sleeve enters the Flux zone, a permanent magnet swings towards the seal pipe. This movement actuates a Microswitch (NO-NC-COM) change-over contacts and vice-versa. (Calibration has to be done against a Rotameter in work shop and is slightly settable). Mainly Flow-No Flow detection is achieved.

 
 
Vane Type Flow Switches
  
DAG Flow switches are Vane / Paddle Design used to detect Flow / No-Flow condition in a flow line. With sufficient Differential Pressure upstream and downstream of a Flow Vane; fluid flow is established. Increase in fluid flow moves Paddle towards a side which in turn moves a Magnetic Sleeve, attached through a Connecting Link, upwards inside a Process Seal Pipe. When this Magnetic Sleeve enters the Flux zone, a permanent magnet swings towards the seal pipe. This movement actuates a Microswitch (NO-NC-COM) change-over contacts and vice-versa. (Calibration has to be done against a Rotameter in work shop and is slightly settable). Mainly Flow-No Flow detection is achieved.

Temperature Switch

The heart of DAG temperature switch is a German make Jumo vapor filled thermostat, one of the best available in the world.

 
 
Reed Level Switch
  
DAG Level switch (top mounted type) facilitates any number of pre-determined level controls initiating audio-visual signals with a single unit. It is designed to provide reliable operation in several industrial applications. The unit consists of a vertical guide pipe (stem), within which are located the sensor switches, magnetic float sliding over the stem according to the level in the tank, switch terminal housing (head) and necessary mounting connection.

 
 
Reed Switch cum Indicator
  
DAG Level switch cum indicator facilitates any number of pre-determined level controls and local visual indication. It is designed to provide reliable operation in several industrial applications. The unit consists of a vertical guide pipe (stem), within which are located the sensor switches, magnetic float sliding over the stem according to the level in the tank, switch terminal housing (head) and necessary mounting connection. The float & stem is enclosed in an acrylic tube or metal clad glass, serving as an indicator. a Rotameter in work shop and is slightly settable). Mainly Flow-No Flow detection is achieved.

 
 
Rota meter Reed Switch
  
DAG Level switch cum indicator facilitates any number of pre-determined level controls and local visual indication. It is designed to provide reliable operation in several industrial applications. The unit consists of a vertical guide pipe (stem), within which are located the sensor switches, magnetic float sliding over the stem according to the level in the tank, switch terminal housing (head) and necessary mounting connection. The float & stem is enclosed in an acrylic tube or metal clad glass, serving as an indicator. a Rotameter in work shop and is slightly settable). Mainly Flow-No Flow detection is achieved.

Pressure Transmitters

Air Flow Transmitters