This product has been retired.
Need Help? Call 1-800-884-4967
Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET
Repair & Calibration: Instrumart is a factory service center for the original Star series. Call 1-800-884-4967 to discuss.
Freeze Warning 2-day shipping strongly recommended to reduce risk of freezing. Any damage caused by freezing is not covered by warranty.

Features

  • Simultaneous display of pH, Dissolved Oxygen and temperature measurements
  • Backlit LCD
  • Handheld or benchtop models
  • Storage of up to 10 individually password-protected methods for easy retrieval of operation procedures
  • Datalog up to 750 points with time and date stamp
  • RS232 port for easy data downloading and software updates

The Thermo Scientific Orion 4-Star Plus pH/dissolved oxygen meter features waterproof hand-held or splash-proof benchtop models and has the ability to simultaneously display pH, conductivity and temperature measurements. This Thermo Scientific Orion pH/dissolved oxygen meter features ranges of -2.000 to 19.999 (pH), ±1999.9 (mV) and -5 to 105°C (temperature).

Other features of the Thermo Scientific Orion 4-Star Plus pH/dissolved oxygen meter include a backlit LCD, Smart Stability and Smart Averaging functions for automatically optimized accuracy, precision and response time, a resistivity range of 0.000 to 3000 mS/cm and the compatibility with 2-electrode and 4-electrode conductivity cells.

There are several different kits available for both style meters.

Benchtop Meter Kits
Application Sensor(s) Accessories & Solutions

TRIS Fresh Water

  • 8102BNUWP ROSS Ultra refillable glass pH electrode
  • 927005MD Epoxy ATC probe
  • 081010MD DO probe with 3 meter cable
  • Swing arm electrode stand
  • pH 4.01, 7.00, and 10.01 buffers (pint bottles)
  • DO calibration sleeve
  • BOD reservoir, stirrer and adapter
  • DO probe maintenance kit - 080113

Portable Meter Kits
Application Sensor(s) Accessories & Solutions

Fresh Water 1

  • 9107WMMD Low maintenance epoxy pH/ATC Triode electrode with 3 meter cable
  • 083010MD DO probe with 3 meter cable and calibration sleeve
  • Beaker
  • pH electrode storage solution (5 x 60 mL bottles)
  • pH 4.01, 7.00, 10.01 buffers (10 x 15 mL pouches)
  • DO probe maintenance kit - 080513
  • Protective probe guard
  • Soft field case

Fresh Water 3

  • 9107BNMD Low maintenance epoxy pH/ATC Triode electrode
  • 083005MD DO probe with calibration sleeve
  • Beaker
  • pH electrode storage solution (5 x 60 mL bottles)
  • pH 4.01, 7.00, 10.01 buffers (10 x 15 mL pouches)
  • DO probe maintenance kit - 080513
  • Protective probe guard
  • Hard field case
Probes
Thermo Scientific Orion Dissolved Oxygen Probes
Dissolved oxygen probes for your Thermo Scientific Orion meter
Starting at
$538.00
$473.44
Thermo Scientific Orion ROSS pH Electrodes
The best performing pH electrodes on the market
Starting at
$402.00
$353.76
Thermo Scientific Orion Green pH Electrodes
Environmentally friendly pH electrodes contain no lead, mercury or other hazardous substances
Starting at
$135.00
$118.80
Thermo Scientific Orion pH Electrodes
pH electrodes available in a variety of styles
Starting at
$128.00
$112.64
In Stock
Thermo Scientific Orion No Cal pH Electrodes
No calibration pH Electrode with 8-pin DIN connector
$402.00
$353.76
Thermo Scientific Orion ORP Electrodes
ORP/redox electrodes available in a variety of styles
Starting at
$351.00
Calibration
Thermo Scientific Orion Dissolved Oxygen Calibration Accessories
Calibration accessories for Thermo Scientific Orion dissolved oxygen electrodes
Starting at
$130.00
$114.40
Printers
Thermo Scientific Orion Inkjet Printer
Star series inkjet printer creates an instant record of test results
$676.00
$594.88
Thermo Scientific Orion Replacement Ink Cartridge
Replacement ink cartridge for Model 1010006 ink jet printer
$44.80
$39.42
Thermo Scientific Orion Printer Paper
Replacement printer paper for Model 1010006 ink jet printer
$15.60
$13.73
Protection
Thermo Scientific Orion Dissolved Oxygen Probe Guards
Probe guards for Thermo Scientific Orion dissolved oxygen electrodes
Starting at
$124.00
$109.12
Cases
Carrying cases, spare cases
Thermo Scientific Orion Star Series Case
Soft field case for Thermo Scientific Orion Star series meters
$147.00
$129.36
Solutions
Thermo Scientific Orion pH Electrode Cleaning Solutions
Cleaning solutions for Thermo Scientific Orion pH electrodes
Starting at
$32.20
Thermo Scientific Orion pH Electrode Storage Solutions
Storage solutions for Thermo Scientific Orion pH electrodes
Starting at
$55.80
Thermo Scientific Orion pH Buffers
pH buffers for Thermo Scientific Orion pH electrodes
Starting at
$19.00
Thermo Scientific Orion Electrode Filling Solutions
5 x 60 mL bottles of electrode filling solution
Starting at
$93.20
Thermo Scientific Orion ORP Standards
ORP standards for Thermo Scientific Orion pH electrodes
Starting at
$61.40
Accessories
Please consider these optional accessories.
Thermo Scientific Orion Dissolved Oxygen Maintenance Kit
Maintenance kits for Thermo Scientific Orion dissolved oxygen meters
Starting at
$113.00
Thermo Scientific Orion Dissolved Oxygen BOD Adapters
BOD adapters for Thermo Scientific Orion dissolved oxygen electrodes
Starting at
$132.00
$116.16
Thermo Scientific Orion Electrode Storage Chamber
Electrode storage chamber (for meter impact jacket) for Thermo Scientific Orion Star series meters
$63.00
$55.44
In Stock
Thermo Scientific Orion Star Series Adapters
Adapters for Thermo Scientific Orion Star series meters
Starting at
$60.00
$52.80
Thermo Scientific Orion Automatic Temperature Compensation Probes
Environmentally safe, mercury-free and EPA compliant
Starting at
$250.00
$220.00
Spare Parts
Thermo Scientific Orion Dissolved Oxygen Membrane Caps
Membrane caps for Thermo Scientific Orion dissolved oxygen electrodes
Starting at
$52.00
$45.76