Description pH/ORP Smart Sensor | 2751 Technical Specifications General Compatible Electrodes DryLoc® pH and ORP Electrodes, Models 2724-2726 | 2734-2736 | 2744-2747 | 2756-2757 Wet-Tap | 2774-2777 Operating Range pH -1 to 15 pH ORP ±2000 mV Response Time pH Electrode dependent ORP Application dependent Materials In-line PBT (thermal plastic polyester) Polypropylene (retaining nut) Submersible CPVC Electrical Cable 4.6 m 15 ft 3-conductor shielded (3-2751-1 in-line and the 3-2751-3 or -4 submersible sensor electronics only) See ordering information for additional cable sizes 22 AWG For 9900, 9950, and 4 to 20 mA max. Cable length is 305 m (1,000 ft). For 8900, please refer to the Cable Calculation Table of the catalog for max. cable length. Power 12 to 24 VDC ±10%, regulated for 4 to 20 mA output 5 to 6.5 VDC ±5% regulated recommended 3 mA max. for digital (S3L) output Current Output pH Fixed 4 to 20 mA, isolated, = 0 to 14 pH (custom scaling available with 0252 tools) ORP Fixed 4 to 20 mA, isolated, = -1000 to 2000 mV (custom scaling available from ± 2000 mV with 0252 tools) Max. Loop Resistance 100 Ω max. @ 12 V 325 Ω max. @ 18 V 600 Ω max. @ 24 V Accuracy ±32 µA Resolution ±5 µA Update Rate 0.5 seconds Error Indication 3.6 mA | 22 mA | none Digital (S3L) Output Serial ASCII | TTL level 9600 bps Accuracy pH ± 0.02 pH @ 25 °C ± 0.02 pH @ 77 °F ORP ± 1.5 mV @ 25 ° C ± 1.5 mV @ 77 °F Temperature ≤ 0.4 °C 0.72 °F Resolution pH ≤ 0.01 pH ORP 1.5 mV Update Rate 0.5 seconds Available Data Raw mV | pH or ORP | Temperature (pH) | Glass Impedance (pH) Minimum mV (pH) | Maximum mV (pH) | Minimum Temperature (pH) Maximum Temperature (pH) | Model Number | Serial Number | Manufacturing Date |Runtime | Slope pH/mV | Measurement Offset | Temperature Error Indication Open input diagnostic | Broken glass detection (pH) | High Impedance Input Impedance, Z 1011 Ω Environmental Enclosure 3-2751-1 & -2 NEMA 4X/IP65 with an electrode connected 3-2751-1 & -4 NEMA 6P/IP68 with an electrode and watertight conduit and/or extension pipe connected Maximum Temperature/Pressure Rating Submersible 0 °C to 85 °C 32 °F to 185 °F In-line 0 °C to 85 °C 32 °F to 185 °F Storage Temperature -20 °C to 85 °C -4 °F to 185 °F Relative Humidity 0 to 95%, non-condensing (without electrode connected) Shipping Weight (based on 4.6m (15ft) cable lengths) 2751-2 0.75 kg 1.65 lb 2751-1, -3 & -4 0.64 kg 1.41 lb Standards And Approvals CE | FCC RoHS compliant | China RoHS Manufactured under ISO 9001 | ISO 14001 | ISO 45001 pH/ORP Smart Sensor | 2751
