HF scientific Online Chlorine Monitor

Measures free or total chlorine using EPA-approved colorimetric DPD method
  • User-selectable cycle times
  • Two user-selectable alarms
  • 4 to 20 mA and RS-485 with Modbus output
The monitor uses economical and reliable colorimetric DPD (N,N-diethyl-p-phenylenediamine) chemistry to measure either free or total chlorine up to 10 mg/L. Measurement cycles can be set between 90 seconds up to 10 minutes for reagent and control optimization. Measurements are preceded by a zero measurement to compensate for color of the sample. The monitor features a scaleable 4 to 20 mA output and RS-485 with Modbus, as well as two user-selectable alarm relays.

The monitor is housed in a NEMA 4X (IP66) corrosion-resistant enclosure that comes ready to surface mount. The enclosure has a transparent cover that allow direct view of the measured value as well as the sample chamber and removable cuvette.

Sample to the unit is provided by user-supplied 1/2" OD semi-rigid or rigid tubing that connects by a push-to-connect fitting at pressures of 1 to 200 psi. The sample drain is a 1/2" hose barbed fitting; order drain hose separately. The monitor accepts 100 to 240 VAC, 47 to 63 Hz power input,;order power cord separately below or directly hard wire. Monitor does not include dry chemical reagents; order separately.

$75.75 - $3,847.00USD / Each

7 variations of this product are available.

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Output Current
Availability Pricing
HF Scientific 20040 Online Chlorine Monitor, 100 to 240 VAC, 47 to 63 Hz EW-99673-00 Mfr # 20040
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4-20mA
$3,847.00USD / Each
HF Scientific 09951 Free Chlorine Reagent, powder, 30 day supply EW-99673-10 Mfr # 09951
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$75.75USD / Each
HF Scientific 09952 Total Chlorine Reagent, powder, 30 day supply EW-99673-12 Mfr # 09952
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$85.00USD / Each
HF Scientific 09953 Free Chlorine Reagent, powder, 60 day supply EW-99673-14 Mfr # 09953
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$130.90USD / Each
HF Scientific 09954 Total Chlorine Reagent, powder, 60 day supply EW-99673-16 Mfr # 09954
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$137.00USD / Each
HF Scientific 09955 Free Chlorine Reagent, powder, 12 month supply EW-99673-18 Mfr # 09955
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$697.50USD / Each
HF Scientific 09956 Total Chlorine Reagent, powder, 12 month supply EW-99673-20 Mfr # 09956
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$710.75USD / Each
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