INSTRUMENTATION > FLOW > DS08 Viscosity Compensated Flow Meter/Switch
DS08 Flow Meter/Switch CLARK SOLUTIONS

DS08 Viscosity Compensated Flow Meter/Switch

F.S. Ranges From 0.8 to 90 l/min

DESCRIPTION
The flow meter and switch model DS08 works according to a modified variable area principle. The float is guided in a cylindrical measuring tube by means of a spring. The flowing medium moves the float in the flow direction. An externally mounted pointer indicator is magnetically coupled to the float and thus, following the float position, indicates the flow rate on a scale.

A reed contact is mounted outside the meter in a sealed housing. When the float reaches the position of the reed contact the switch will close. With higher flows the float moves further upward until it reached a built-in float stop, still keeping the switch closed. This ensures a bistable switch function at any time. The reed contact is adjustable over the full measuring range of the meter.

The built in spring and magnetic float are very reliable. As the spring opposes the float and the flow, it is possible to mount the flow meter in any orientation. The strong spring, combined with an orifice in the float, limit the effects of viscosity changes to an absolute minimum compared to regular variable area flow meters.


SPECIFICATIONS
Max Pressure:
  DS08.2 brass - 250 bar (3,625 PSIG)
  DS08.4 brass - 250 bar (3,625 PSIG)
  DS08.2 stainless - 300 bar (4,350 PSIG)
  DS08.4 stainless - 300 bar (4,350 PSIG)
Pressure Drop:
  DS08.2 - 0.02-0.4 bar (0.3-5.8 PSI)
  DS08.4 - 0.02-0.2 bar (0.3-2.9 PSI)
Max Temperature: 120°C (160°C available
  as option)
Materials:
  Wetted Parts - Nickel plated brass or SS
  1.4571
  O-rings -
              Brass Version - Buna
              SS Version - Viton
Electrical Connections - DIN 43650 plug
Accuracy - ±4% f.s.
Ranges: 0.1-0.8 l/min to 30-90 l/min
  viscosities to 600 cSt
APPLICATION
The variable area flow meter and switch model DS08 is used for measuring and monitoring the flow of viscous liquids, i.e., in central lubricating systems, lubricating circuitry, hydraulics, transformer oils, etc.


FEATURES

For Viscous Media to 600 CST

Small Mounting Dimensions

Brass or Stainless Steel Connections

Universal Mounting Position

High Switching Accuracy

Low Switching Hysteresis
CONTACTS
Function      
N/O: 250V 3A 100VA
SPDT: 250V 1.5A 50VA
*EX-N/O: 250V 2A 60 VA
*EX-SPDT: 250V 1A 30VA
*Per ATEX 100aEXII 2 G, EEx m II T6
DIMENSIONS
Model Dimensions in mm Weight
with w/o
SW D D1 B G T L Indicator
DS08.M 27 31 48 48 1/2 NPT 14 90 350 ---
DS08.S 40 40 57 68 1.0 NPT 17 130 1000 1050
  Special Connections  
DS08.M         1/4 NPT 14 98 400 ---
          3/8 NPT 14 108 450 ---
DS08.S         1/4 NPT 21 152 1100 1150
          1/2 NPT 21 152 1100 1150
          3/4 NPT 21 152 1100 1150
DS08 with indicator Diagram
Electrical Connection
ORDERING INFORMATION
Order Number Example DS08M2N1103110
Viscosity compensated variable area flow meter and switch
PLEASE CALL 1-800-253-2497 TO ORDER THESE ITEMS
Size: M= Miniature S= Standard
Connection: 2N= 1/2” female NPT 4N= 1” female NPT
Material: 1= brass with 301 stainless steel spring 2= all 316 stainless steel
Scale: 1= for viscous media  
Measuring Ranges:
DS08.2 only: 01= 0.1 - 0.8 l/min 03= 0.5 - 1.6 l/min
04= 0.8 - 3 l/min 05= 2 -7 l/min
DS08.4 only: 06= 0.1 - 0.8 l/min 07= 0.5 - 1.5 l/min
08= 1 - 4 l/min 09= 2 - 8 l/min
10= 3 -10 l/min 11= 5 -15 l/min
12= 8 -24 l/min 12A= 1-20 l/min
13= 10 -30 l/min 13A= 4-40 l/min
14= 15 -45 l/min 14A= 5-50 l/min
15= 20 -60 l/min 15A= 8-60 l/min
16= 30 -90 l/min 16A= 12-70 l/min
17= 35-110 l/min 17A= 15-80 l/min
No. of contacts: 0= without contacts 1= 1 contact
2= 2 contacts  
Contact function: 0= without contact 1= N/O
2= SPDT 3S= Ex-N/O, not for DS08.M
3U= Ex-SPDT, not for DS08.M  
Flow Indicator 0= No Flow Indicator 1= Flow Indicator (available for 1”, 4N connection size only)

This product sold by PKP Process Instruments, Inc., a joint venture of Clark Solutions
and PKP Prozessmesstechnik GmbH.