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pH/ORP indicator with LED alarm signals

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HI-981406
HI 981406

pH/TDS combination Gro'Chek® with large LCD

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HI-981404N
HI 981404N

TDS Gro'Chek® tester

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Hi981409
HI 981409

TDS Gro'Chek® with large LCD

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HI-983301N---HI-983302N
HI 983301N

TDS Gro'Chek® with large LCD

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HI-983301N---HI-983302N
Larger picture 
HI 983301N/5

TDS indicator

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Pronto-TDS
Larger picture 
HI 983308

TDS indicator

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Pronto-TDS
HI 983306

Temperature indicator (°C) with visual high alarm
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HI 148-00

Temperature indicator (°F) with visual high alarm
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HI 148-01

Temperature indicator with visual high alarm & relay output
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HI 150-10

Temperature indicator with visual low alarm & relay output
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HI 150-00

Wall-mounting thermometer (°C) with Cal-Check
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HI-146
HI 146-00

Wall-mounting thermometer (°F) with Cal-Check
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HI 146-01

Wall-mounting waterproof thermometer (°C) with Cal-Check
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HI 146-99