Panel Mounted Conductivity Meter - Liquids

  • Panel Meter for Conductivity measurement
  • Broad measurement range (with 4 electrode cells)
  • Works with 2 or 4 electrode cells
  • Temperature Compensation (with Pt100)
  • Relay and analog outputs
  • Min Max Peak Hold (option )
  • AC or DC powered
  • Standard 98 x 46 mm panel size

The LF9648 Martens Conductivity Meter has been designed for the measurement of conductivity, using standard 2 electrode or 4 electrode conductivity cells. When used in connection with 4-electrode cell it provides high accuracy over a large range of conductivity. For measurements of ultra pure water it should be used with a two electrode cell with a low cell constant 0.1) for a high accuracy and sensitivity. The meter features a variety of options including analog and relay outputs, choice of power supply, and temperature monitoring via Pt100 or Pt1000 platinum resistance thermometers.

Common Specifications

Range 0..2.000(0) μS/cm up to 0..2000 / 200(0) mS/cm (at 25 °C)
Cell Constants 0.080..9.999

0.5 % of the measuring value, ±2 Digit

Temperature - compensation non linear for ultra pure water and natural water or linear programmable from 0.000..9.999 %/K
Temperature measurement range -50.0..+200.0 °C; Sensor Pt100 or Pt1000
Temperature measurement Accuracy ±0.2 °C
Display Red LED 14.2mm
Range 4 digit with leading zero suppression
Parameter indicator 2 digit 7mm red LEDs
Power Supply Voltage 230 V AC ±10 %; 115 V AC ±10 %; 24 V AC ±10 % or 24 V DC ±15 %
Power consumption max. 3.5 VA, 5 VA with analog output
Operating Temperature -10..+55 °C
Relay SPDT < 250 V AC < 250 VA < 2 A, < 300 V DC < 50 W < 2 A
Transistor transistor, <35 V AC/DC, max.100 mA, short circuit protected
Analog Output Active 0/4..20 mA Load ≤500 Ω;
0/2..10 V Load >500 Ω, isolated automatic load changing (load dependent)
Analog Ouptut Passive 4..20 mA, ext.
Load = RA[Ω]≤ (supply - 5 V) ÷ 0.02 A ;
supply voltage 5..30 V DC,
Accuracy 0.1 %; TK 0.01 %/K
Case panel mounting DIN 96x48 mm,
material PA6-GF; UL94V-0
Dimensions front 96x48 mm, mounting depth 100 mm,
Weight max. 390 g
Connection quick clamp push in terminals, for 0.08..1.5 mm², AWG28..AWG14 wire

Ordering Information

Model Price each Order Online
Part number is made up as follows LF9648 A-B-C-D-E-F-G (NB Sensors have to be ordered separately )    
A = Designation for terminal strip A - enter either '1' for temperature compensation with Pt 100 or ''3 for Pt1000    
B= Options for terminal strip B enter either '00' for none, 2R for relays, or '2T' for electronic output    
C= Options for terminal strip C enter either '00' for none, '2R' for relays or '2T' for electronic output,
     or 'AO' for analog outputs 0/4..20 mA, 0/2..10 V DC
     or '2A' for dual analog outputs 4-20mA passive
D=Supply voltage option, either enter '0' for 230V AC, '1' for 115VAC '4' for 24VAC or '5' for 24 Volts DC    
E=Choice of options, enter either '00' for no options, '01' for min/ max peak hold, '14' for measuring acc to USP645    
F=Enter '6' for unit appears in the unit field    
G=Enter '7' for Additional text above the display 3mm high by 90mm wide include text with order