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The combination Photoelectric Smoke/Heat Sensor is a listed Analog/Addressable smoke sensor and fixed temperature heat sensor compatible with any fire alarm control panel that has the Potter/Nohmi protocol. The PSHA is a low profile combination smoke/heat sensor with a wide sensitivity range. The heat sensing portion utilizes a proven thermistor for accurate and reliable heat detection. The sensor and base (not included) are made of a durable plastic in an eggshell white (off white) to blend in with the ceiling.