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AlpHa Measurement Solutions
10540 Rockley Road
Houston, TX 77099

(Toll Free) 800-522-7920
(voice) 832-456-4100

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Rosemount® Analytical Replacement Sensor Assemblies

  • Improved Life and Performance
    Van London Co. pH electrode designs have been field proven in a variety of harsh applications and when manufactured with our Solid Polymer Reference™ fill the life of the electrode is prolonged and the overall performance of the electrode is enhanced.
  • Quick Order Turn-around
    An inventory stocking arrangement reduces lead times from weeks to days. Housed pH electrodes generally consist of two parts: a 12mm glass-bodied electrode and a housing machined to accept that electrode. Minimal factory assembly is required before shipment to the customer site.
  • Custom Styles
    Housings can be machined from numerous materials with several electrode guard designs and various insertion depths. Custom electrode designs can maximize sensor life in the harshest of environments.
  • Easy, Low Cost Replacement
    Direct Rosemount® replacements are dimensionally matched to existing equipment so that no expensive retrofit changes are necessary. Simple, quick removal of the replacement element for Van London Co. standardization is all that is required.
  • Reduced Maintenance and Inventory
    Conversion from Rosemount® Analytical assemblies to Van London Co. designs is quick and inexpensive, and will eliminate costly maintenance and inventory requirements.


Measurement Types:   GXV - Multipurpose pH glass formulation (0-14.00 pH)
Antimony - For pH measurements in Hydrofluoric Acid applications (2.00-7.00 pH) (0-80°C)


P65Warning WARNING: Cancer -


Reference Types:   SPR™ - Double junction, SOLID POLYMER REFERENCE (0-130°C)
Tuff Tip™ - New design incorporating larger reference junction surface area & electrode guard (0-130°C)
LCJ - Dramatically increases reference junction surface area. Standard material is ceramic but porous Teflon and porous Kynar are available.
Retractable Sensors
Retractable Sensors 396VP/396R/385/385+/398R
Disposable Sensor:
R-100B - XX QQ - M M     *Titanium Tube with PT100S Temp. Comp.
  | | |
  | | Tube length in inches (06,16,21 & 36)
  | Connector Type
  | H Hanked (tinned)
  | BH Male BNC & Hanked (tinned)
  Lead Length
  Lead Length in even feet
Rebuildable Sensor:
A - 300B - XX QQ pH electrode with *PT100S Temp. Comp.
3500720 - MM   *Titanium Tube
1600720 - MM   Rear housing for Rebuildable Tube
  MM = Tube length in inches (06, 16, 21 & 36)
* 316 Stainless Steel optional
1" MPT Sensors
1 inch MPT Sensors 396VP/396P/389/399/GP1
V - 500B - XX QQ Kynar Body with *PT100
  | |
  | Lead Length
  | Specify lead length in even feet
  Connector Type
  H Hanked (tinned)
  BH Male BNC & Hanked (tinned)
* Other Temp. Comps. available
Series III Flow Cell
Series III Flow Cell
R - 4002   Glass mono pH Electrode
R - 4001   Reference mono Electrode
86A0110   Temp. Comp. PT100S
381 Flow Cell
381 Flow Cell
R - 4002   Glass mono pH Electrode
R - 4003   Combination pH Electrode
320 Flow Cell
320 Flow Cell
V - 0010 - XX QQ Combination 100mm pH Electrode
  1600705 Kynar gland fitting with dual Viton O-rings
Steam Sterilizable & Autoclavable
Steam Sterilizable & Autoclavable
(S8 Connector)
I - 100B - F MMM Combination pH electrode with PT100S Temp. Comp.
I - 1000 - S8 MMM Combination pH electrode without Temp. Comp. & S8 Connector
  MMM = Electrode Dimension in millimeters (120, 225, 325, 400 & 425)
HX 348
I - 2000 - S7 - MMM Refillable Combo pH electrode 120mm with S7 Connector
I - 3000 - S7 - MMM Sealed Combo pH electrode 120mm with S7 Connector
  MMM = Electrode Dimension in millimeters (120, 150, 200 & 250)
  1507311 1½" Ball Valve 316 SS
  1500143 1" MPT Twist-lock adapter, 316 SS
  1600143 1" MPT Twist-lock adapter, Kynar®
  1500705 ½" MPT Gland fitting, 316 SS for 320 Flow cell
  1600705 ½" MPT Gland fitting, Kynar® for 320 Flow cell
  3000650 1" MPT Gland fitting, 316 SS for all Retractable styles
  86A0110 Temp Comp for Series III (PT100)
  3500720 16" Titanium Tube for all Retractable styles
  3500720-06 6" Titanium Tube for all Retractable styles
  1600720 Rear housing for 16" Retractable
  1600720-06 Rear housing for 6" Retractable
Optional Configurations:
For all 1" MPT designs with
integral preamp:
Detachable Preamp Design
Detachable Preamp Design
For all 1" MPT designs without
integral preamp:
Twist-Lock Design with adapter
(adapter not shown)
Twist-Lock Design with Adapter
For H x 348: Solid State
ISFET Design
Solid State ISFET Design
Retractable Design:
MK7Z Hot Tap Design
MK7Z Hot Tap Design
Materials of COnstruction:
  Housing - Kynar® (standard), PEEK® (optional), CPVC (optional)
  O-Rings - Viton® (standard), EPDM (optional), Kalrez® (optional)
Temperature Compensation:
  1181pH - PT100 or 3K Balco - Preamplifier dependent
  2081pH/1054pH/2054pH/Solucomp - PT100
  3081pH/4081pH/81pH - PT100
For Solution Ground / Diagnostics Consult Factory
Electrode Solutions
9210038 4.00pH, 7.00pH and Deionized Water Rinse (1 pint each)
9210037 4.00pH, 7.00pH and 10.00pH (1 pint each)
9210039 7.00pH, 10.00pH and Deionized Water Rinse (1 pint each)
9210079 Anti-fouling solution to reduce electrode-coating problems
9210008-125 Electrode storage solution KCl/4.00 pH buffer (125 ml)
Kynar is a trademark of the Pennwalt Corporation
Viton is a trademark of E.I. Dupont de Nemours & Company