# 2.4.7 — Field Specialty Sensors

**Module:** [bms/field-devices-hvac](../../../_playbook/modules/bms/field-devices-hvac.md)
**WBS leaf:** 2.4.7
**Project:** Kingsford Hotel Bacolod — BMS (AB-Run-6)
**Date:** 2026-04-28

### Project-specific values
- **CO2:** AHU + DOAS return ducts (Casino MVAC + select BOH AHU).
- **CO:** Casino DOAS-2M return duct (gaming-board IAQ).
- **VOC:** Casino Air Ionizers (2 units).
- **Oxygen:** boiler flue-gas (SB-1/2 — 2 sensors).
- **pH/Conductivity:** CT-1/2/3 blowdown corrosion/scale monitoring.
- **References:** A1 (CO Sensor / CO2 Sensor / VOC Sensor / Oxygen Sensor / pH Sensor rows), BMS-02 Casino + CT blocks.