HM DIGITAL - SP-2 SENSOR PROBE FOR THE DM-1 (8 PIN) HM Digital Sale! from 1190 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. REPLACEMENT SENSOR HM DIGITAL SP-2: DUAL TDS SENSOR PROBES FOR THE DM-1 Stainless steel sensors Probe: 1/4" Cable: 24.5" Connector: 8-pin Thermometer pins: Yes Each sensor of the pair has a blue or red wrap and labeled "IN" or "OUT" Pressure Rating