Our Story

Jenco Instruments was founded by Mr. John Jen over 35 years ago on the idea that advances in semiconductor chips and circuit boards can play major roles in miniaturizing water quality instruments while increasing ease of use, features and accuracy.  That idea led to the creation of the very first portable digital pH meter and was sold under Cole-Parmer's private brand.  

Today the same innovative spirit is prevalent in our line of water quality instruments which now spans pH, ORP, conductivity, dissolved oxygen, ion and temperature meters, testers, portable, benchtops and online analyzers.  Though Jenco remains a family owned business and is small compared to consolidated multinational corporations, it is proud that its products can be found in research facilities, universities, manufacturing facilities, municipalities and homes all over the world.  The EPA, NASA, Anheiuser-Busch, Craft Foods and thousands of other companies trust their water quality readings to Jenco.

All Jenco meters are designed and manufactured in its ISO9001 and IECQ Hazardous Substance Process Management certified manufacturing facility in Shanghai, China.  This same Jenco facility also designs and makes products for other high end water quality manufacturers.

Products

 

 
5001

5001pH Portable Meter

pH handheld meter with build in tabletop stand and LCD digital display.

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5003

5003pH, ORP Portable Meter

pH/mV handheld meter with build in tabletop stand with LCD digital display.

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5005

5005pH, ORP, Temperature Portable Meter

pH/mV/Temp. handheld meter with build in tabletop stand with LCD digital display.

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60

60pH Portable Meter

pH handheld meter with BNC, LCD display and manual temperature compensation with two point calibration via potentiometers for ease of use.

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6007

6007pH Portable Meter

pH/Temp. handheld splash proof meter, microprocessor based with LCD display of both temperature and pH.

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601A

601ApH, ORP Portable Meter

pH/mV handheld meter with manual temperature compensation and pH calibration via knobs and pH slope calibration potentiometer.

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6027

6027pH, ORP, Temperature Portable Meter

pH/mV/Temp. handheld splash proof meter, microprocessor based with LCD display of both temperature and pH.

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609

609pH Portable Meter

pH handheld meter with LCD digital display and manual temperature compensation.

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611

611pH Portable Meter

pH Analog handheld meter with pH 2.

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6230

6230pH, ORP, Temperature Portable Meter

pH/mV/Temp. microprocessor handheld meter in splash proof case with RS-232-C IBM compatible communication interface and BNC, pH/ORP connector with 8-pin DIN ATC connector.

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6230M

6230MpH, ORP, Temperature Portable Meter

pH/mV/Temp. microprocessor handheld meter in splash proof case with 3 point calibration, 40 memory storage, RS-232-C IBM compatible communication interface and BNC, pH/ORP connector with 8-pin DIN ATC connector.

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6230N

6230NpH, ORP, Temperature Portable Meter

pH/mV/Temp. microprocessor handheld meter in splash proof case with 3 point calibration, RS-232-C IBM compatible communication interface and BNC, pH/ORP connector with
8-pin DIN ATC connector.

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6231

6231pH, ORP, Temperature Portable Meter

pH/mV/Temp. microprocessor handheld meter in splash proof case with 4-pin connector for Jenco 3-in-1 pH/ATC electrodes.

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6231M

6231MpH, ORP, Temperature Portable Meter

pH/mV/Temp. microprocessor handheld meter in splash proof case with 3 point calibration, 40 memory storage, BNC, pH/ORP connector with 8-pin DIN ATC connector.

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6231N

6231NpH, ORP, Temperature Portable Meter

pH/mV/Temp. microprocessor handheld meter in splash proof case with 3 point calibration, BNC, pH/ORP connector with
8-pin DIN ATC connector.

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6250

6250pH, ORP, Ion, Temperature Portable Meter

pH/mV/ION/Temp. microprocessor handheld meter in splash proof case with RS-232-C IBM compatible communications interface, BNC pH/mV/ION connector and 8-pin DIN ATC connector.

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6251

6251pH, ORP, Ion, Temperature Portable Meter

pH/mV/ION/Temp. microprocessor handheld meter in splash proof case, BNC pH/mV/ION connector and 8-pin DIN ATC connector.

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6350

6350pH, ORP, Conductivity, Salinity, Temperature Portable Meter

The Jenco 6350 is a high performance pH/Conductivity/
Salinity/mV
/Temp.

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6810

6810pH, ORP, Temperature Portable Meter

Jenco VisionPlus pH6810 is an easy to use, IP67 rated pH meter with mV and temperature readout.

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610

610pH Tester

pH Tester personal pocket pen style with single point calibration.

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612

612pH Tester

Portable Digital pH Stick Meter with replaceable pH electrode.

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618

618pH Tester

VisionPlus pH618 is an advanced pH tester with temperature readout, menu driven operation and replaceable electrode module.

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618N

618NpH Tester

VisionPlus pH618N is the most advanced pH tester on the market, with IP67 body, 50 data point storage, menu driven operation and replaceable electrode module.

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619

619pH Tester

VisionPlus pH619
is an IP67 rated pH tester with graphical LCD display and electrode efficiency display, menu driven operation and replaceable electrode module.

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620

620pH Tester

pH Tester personal pocket pen style with ATC and dual point calibration.

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620D

620DpH Tester

pH Tester personal pocket pen style with ATC and dual point calibration.

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630

630pH, Temperature Tester

VisionPlus pH630 is an IP67 rated pH tester with temperature readout.

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3671N

3671NpH, ORP In-line Controller

1/8 DIN panel mount pH/ORP controller with dual SPDT Hi/Lo relays, manual set points and calibration are via potentiometers.

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3675

3675pH, ORP In-line Controller

1/4 DIN panel mount pH/ORP controller/transmitter with dual SPDT Hi/Lo relays, manual set points and calibration are via potentiometers.

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3676

3676pH, ORP In-line Controller

1/4 DIN panel mount pH/ORP controller
/transmitter with dual SPDT
Hi/Lo relays, manual set points and calibration are via potentiometers.

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3677

3677pH, ORP In-line Controller

1/8 DIN vertical configuration panel mount pH/ORP controller/transmitter with dual SPDT Hi/Lo relays, manual set points and calibration are via potentiometers.

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3679N

3679NpH, ORP In-line Controller

1/4 DIN panel mount pH/ORP controller/transmitter in a waterproof IP-65 enclosure.

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6303C

6303CpH, ORP, Temperature
In-line Controller

1/4 DIN panel mount pH controller, microprocessor based with membrane type keypad and password protection.

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6303P

6303PpH, ORP, Temperature In-line Controller

1/4 DIN panel mount pH controller microprocessor based with membrane type keypad and password protection.

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6308PT

6308PTpH, Temperature In-line Analyzer

1/4 DIN panel mount pH single parameter analyzer with electrode efficiency display function.

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6309PDT

6309PDTpH, Dissolved oxygen, Temperature
In-line Analyzer

pH & D.O. analyzer, 1/4 DIN panel mount
IP-65 case, polarographic sensor with replaceable membranes and programmable pressure and salinity compensation.

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6309POT

6309POTpH, ORP, Temperature In-line Analyzer

pH & ORP analyzer,1/4 DIN panel mount IP-65 case.

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6311

6311pH, ORP, Temperature In-line Analyzer

pH & ORP analyzer,1/4 DIN panel mount IP-65 case.

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6503

6503pH, ORP, Temperature In-line Controller

1/4 DIN panel mount ORP controller
/transmitter, microprocessor based, password protected with membrane keypad.

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6715

6715pH, ORP In-line Controller

Wall mounted controller available in 3 models.

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691N

691NpH In-line Transmitter

1/8 DIN panel
mount pH transmitter with calibration by potentiometers.

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692

692pH In-line Transmitter

1/8 DIN panel mount pH transmitter with
4-20 mA output and calibration by potentiometers.

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693pH

693pHpH In-line Transmitter

2-wire 4-20 mA pH transmitter in a sealed NEMA-4 enclosure powered by 11 to 80 Volts DC.

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695pH

695pHpH In-line Transmitter

2-wire 4-20 mA pH transmitter in a sealed NEMA-4 enclosure with an LCD display powered by 11 to
80 Volts DC.

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1671

1671pH, ORP, Conductivity,
Temperature Benchtop Meter

pH/mV/
Conductivity/
Temperature benchtop meter with dual LCD displays for conductivity and pH/mV/temp.

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3601

3601pH, ORP Benchtop Meter

pH/ORP controller with dual SPDT Hi/Lo relays, manual set points via potentiometers and calibration via potentiometers with a voltage/recorder output and has an internal pH/ORP select switch and large bright red LED display uses a BNC input and spade lug screw type connector block requires a Pt-100 ATC or a simulation resistor for temperature.

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6072

6072pH, ORP, Temperature Benchtop Meter

pH/mV/Temp. dual purpose bench and portable meter, microprocessor based with build in tabletop stand, LCD digital display and ATC.

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6091N

6091NpH, ORP, Temperature Benchtop Meter

pH/mV/Temp. benchtop meter, microprocessor based with built in paper printer with time date stamp and optional RS-232C computer interface.

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6171

6171pH, ORP, Temperature Benchtop Meter

pH/mV/Temp. bench meter, microprocessor based with RS-232C IBM compatible computer interface with dual pH/mV and temperature LCD digital displays, BNC input and ATC probe uses an 8-pin DIN type input.

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6171L

6171LpH, ORP, Temperature Benchtop Meter

pH/mV/Temp. bench meter, microprocessor based with dual pH/mV and temperature LCD digital displays, BNC input and ATC probe uses an 8-pin DIN type input.

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6173

6173pH, ORP, Temperature Benchtop Meter

pH/mV/Temp benchtop meter with an extra large LCD display for ease of use.

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6173R

6173RpH, ORP, Temperature Benchtop Meter

pH/mV/Temp benchtop meter with a very large LCD display for ease of use.

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6175

6175pH, ORP, Ion, Temperature Benchtop Meter

Next generation of pH benchtop meter with mV and temperature readouts, high mV resoution, and large LCD.

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6201

6201pH, ORP, Temperature Benchtop Meter

pH/mV/
Temp. bench meter, microprocessor based with red LED digital display and manual or Pt-100 ATC temperature compensation.

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6209

6209pH, ORP, Ion, Temperature Benchtop Meter

pH/mV/Temp./ION bench meter, microprocessor based with direct Ion concentration readout, and red LED digital display.

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6219

6219pH, ORP, Ion, Temperature Benchtop Meter

pH/mV/Temp./ION bench meter, microprocessor based with direct Ion concentration readout and RS-232C IBM compatible computer interface.

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63

63pH Benchtop Meter

pH Analog benchtop meter with pH 0.

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6307

6307pH, Salinity, Temperature
Benchtop Meter

pH/Conductivity/
Salinity/Temperature benchtop meter with dual LCD displays for conductivity and r pH/mV/temp.

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671PpH, ORP, Temperature Benchtop Meter

pH/mV/Temp. benchtop meter with LCD digital display, voltage recorder output, Karl Fisher output and Pt-100 ATC or manual temperature compensation.

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672P

672PpH, ORP, Temperature Benchtop Meter

pH/mV/Temp. dual purpose benchtop and portable meter with built in desktop stand with LCD digital display, voltage recorder output and Pt-100 ATC or manual temperature compensation.

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628N

628NORP Tester

VisionPlus ORP628N is a very powerful ORP tester with temperature readout, IP67 rated body, 50 memory storage and replaceable ORP electrode module.

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650

650ORP Tester

ORP Tester personal pocket pen style with gain adjust by trimmer.

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3107

3107Conductivity, Salinity, Temperature Benchtop Meter

Conductivity/
Salinity/
Temperature benchtop meter, adjustable cell constants K=0.

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3173

3173Conductivity Benchtop Meter

Conductivity/TDS
/Temperature benchtop meter, with an extra large LCD display, adjustable cell constants K=0.

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3173R

3173RConductivity Benchtop Meter

Conductivity/TDS
/Temperature benchtop meter, with an extra large LCD display, adjustable cell constants K=0.

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3175

3175Conductivity Benchtop Meter

Next generation conductivity benchtop meter, Jenco EC3175 has an large, backlit LCD display, adjustable cell constant.

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6307

6307pH, Salinity, Temperature Benchtop Meter

pH/Conductivity/
Salinity/Temperature benchtop meter with dual LCD displays for conductivity and r pH/mV/temp.

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103

103Conductivity Portable Meter

Conductivity handheld meter with LCD display, rugged splash proof case and replaceable K-1.

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3250

3250Conductivity, Salinity, Temperature Portable Meter

Conductivity
/Salinity
/Temperature Handheld meter, adjustable cell constants K=0.

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3251

3251Conductivity, Salinity, Temperature Portable Meter

Conductivity/Salinity
/Temperature Handheld meter, adjustable cell constants K=0.

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3840

3840Conductivity, TDS, Salinity, Temperature Portable Meter

VisionPlus EC3840 is an easy to use, IP67 rated portable conductivity meter with TDS, salinity and temperature readouts.

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6350

6350pH, ORP, Conductivity, Salinity, Temperature Portable Meter

The Jenco 6350 is a high performance pH/Conductivity/
Salinity/mV/
Temp.

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110

110Conductivity Tester

Conductivity pocket pen style tester, automatic temperature compensation from 5 to 55°C, with calibration via trimmer.

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111

111Conductivity Tester

Conductivity pocket pen style tester, automatic temperature compensation from 5 to 55°C, with calibration via trimmer.

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112

112Conductivity Tester

Conductivity pocket pen style tester, automatic temperature compensation from 5 to 55°C, with calibration via trimmer.

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113

113Conductivity, Salinity Tester

Conductivity/Salinity pocket pen style tester, automatic temperature compensation from 5 to 55°C, with calibration via trimmer.

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640Salinity Tester

Salinity pocket pen style tester, temperature range from 0 to 40°C, with calibration via trimmer.

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EC330

EC330Conductivity, TDS, Temperature Tester

Jenco EC330 is an easy to use, IP67 rated conductivity tester with TDS and temperature readout.

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EC331

EC331Conductivity, Resistivity, Temperature Tester

Jenco EC331 is an easy to use, IP67 rated conductivity tester with resistivity and temperature readouts.

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3101

3101Conductivity In-line Controller

Conductivity controller with analog output, panel mount, 1/8 DIN aluminum case, K=1.

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392

392Conductivity In-line Transmitter

Conductivity Transmitter, panel mount, 1/8 DIN aluminum package, K=1.

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392SBC

392SBCConductivity In-line Transmitter

Conductivity Transmitter, panel mount, 1/8 DIN aluminum case, K=1.

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6308CT

6308CTConductivity, TDS, Temperature In-line Analyzer

Conductivity analyzer, 1/4 DIN panel mount single parameter analyzer with an IP-65 case, and selectable 2 or 4- wire cells.

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9101

9101Dissolved oxygen, Temperature Benchtop Meter

Dissolved Oxygen benchtop meter, uses polarographic type sensor with replaceable membranes and programmable pressure compensation, 600 to 1000 mBar and salinity compensation, 0 to 40.

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9173

9173Dissolved oxygen, Temperature Benchtop Meter

Dissolved Oxygen benchtop meter with extra large LCD display for ease of use.

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9173R

9173RDissolved oxygen, Temperature Benchtop Meter

Dissolved Oxygen benchtop meter with extra large LCD display for ease of use.

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9250

9250Dissolved oxygen, Temperature Portable Meter

Dissolved Oxygen handheld meter, uses polarographic type sensor with replaceable membranes and programmable pressure compensation, 600 to 1000 mBar and salinity compensation, 0 to 40.

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9251

9251Dissolved oxygen, Temperature Portable Meter

Dissolved Oxygen handheld meter, uses polarographic type sensor with replaceable membranes and programmable pressure compensation, 600 to 1000 mBar and salinity compensation, 0 to 40.

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6219

6219pH, ORP, Ion, Temperature Benchtop Meter

pH/mV/Temp./ION bench meter, microprocessor based with direct Ion concentration readout and RS-232C IBM compatible computer interface.

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6209

6209pH, ORP, Ion, Temperature Benchtop Meter

pH/mV/
Temp./ION bench meter, microprocessor based with direct Ion concentration readout, and red LED digital display.

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6250

6250pH, ORP, Ion, Temperature Portable Meter

pH/mV/ION/Temp. microprocessor handheld meter in splash proof case with RS-232-C IBM compatible communications interface, BNC pH/mV/ION connector and 8-pin DIN ATC connector.

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6251

6251pH, ORP, Ion, Temperature Portable Meter

pH/mV/ION/Temp. microprocessor handheld meter in splash proof case, BNC pH/mV/ION connector and 8-pin DIN ATC connector.

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7000CH and H

7000CH and HTemperature Portable Meter

Handheld digital thermometer with switch for °C/°F.

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701

701Temperature Portable Meter

Pocket digital thermometer with mini-jack connector, magnetic back and LCD display.

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TVC-1

TVC-1Temperature Portable Meter

Temperature
/Voltage converters.

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