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Thermo Scientific™ Orion™ 266S Advanced Waterproof Portable pH/mV Meter

Measure and log pH, mV and temperature using the Thermo Scientific™ Orion™ 266S Intrinsically Safe (US) Portable pH Meter

Manufacturer:  Thermo Scientific™ 0266S3

 View more versions of this product

Catalog No. 13-302-111

This item has been discontinued by the manufacturer and is no longer available. Please call customer service for assistance: 1-800-766-7000.



Measure pH, mV and temperature in environments where non-sparking equipment is required using the Thermo Scientific™ Orion™ 266S Intrinsically Safe (US) Portable pH Meter. Log up to 100 data points and use the RS232 port to transfer data to an external device. Intrinsically safe approval rating by Factory Mutual (FM) for US only.

  • Meter can be controlled by a remote PC via RS-232-C output and software for transferring data.
  • Compact, portable waterproof meter simultaneously shows pH and temperature on watertight LCD.
  • Meter features mV mode, GLPcheck™ electrode verification and three-point autocalibration.
  • Three AA alkaline batteries supply power for up to 2000 hours of continuous use.
  • Meter can be controlled by a remote PC via RS-232-C output and software for transferring data to the computer.


  • Meter Only package includes meter, built-in quiver, neckstrap and instruction manual, RS232 cable and software
  • Meter/Electrode package includes meter, Triode™ 3-in-1 Combination pH Electrode, built-in quiver, neckstrap and instruction manual
  • Meter Field Kit package includes meter; built-in quiver; neckstrap and instruction manual; case; stand; electrode holder; beakers; 4, 7, 10 buffers; RS232 cable and software

Compatible with:

0900A0 Orion Model 900A Printer



0.1% of reading ±0.3 mV
1000 hr.
Transfer single or all data points to printer or computer
Orion Intrinsically Safe 266S pH portable meter kit with sensor, field case, beakers and solutions
E-DIN Waterproof (pH electrode), banana plug (ATC temperature probe)
Measure, cal, print, scroll up, scroll down, STO, RCL, clock, power keys
Automatic by interval or event or manual data logging
Orion Intrinsically Safe 266S pH/mV/Temperature Portable Meter
3 AA batteries (included)
±1300.0 mV
0.1, 0.01
-10°C to 55°C (ambient)
-20°C to +120°C
3 Year Meter Warranty
0.6 kg
3 x AA
1 to 3
CE, FM (IS, Class I Div 1 Group A, B, C, D, T4), Ex (Intrinsically Safe)
100 with Time and Date Stamp
16 cm x 13.3 cm x 3 cm (6.30 in. x 5.24 in. x 1.18 in.)
Orion 266S pH meter, 9109WP Orion Triode gel-filled epoxy-body pH/ATC electrode with 1.5 meter cable, field case, beakers, pH buffers, 3 AA batteries
pH with mV and temperature
pH electrode, ATC temperature probe (includes 9109WP Orion Triode pH/ATC electrode)
-2 to 16
14°F to 131°F (ambient)
-4°F to +248°F
Automatic with ATC temperature probe
1.4 lb.
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