# Fireboy-Xintex Fixed Heat Detector w/Base [OMHD-04-DB-R]

**Fixed Heat Detector with Base**

The Fireboy-Xintex Heat Detector uses a single thermistor to sense the air temperature around the detector. This heat detector was designed to detect how fast the temperature is increasing.

**Features:**

-   163°F Fixed Heat Detector
-   Housing: White flame-retardant polycarbonate
-   Terminals: Nickel-plated stainless steel
-   Ideal in environments that are dirty or smoky
-   Unaffected by wind or atmospheric pressure
-   Remote test feature

**Specifications:**

-   Detection Principle: Measurement of heat using a thermistor
-   Sampling Frequency: Once every four seconds
-   Supply Voltage: 8.5 V dc to 33 V dc
-   Supply Wiring: Two wire supply, polarity sensitive
-   Power-up Time: < 20 seconds
-   Minimum: ‘detector active’ voltage: 6 V
-   Holding Voltage: 5 V - 33 V
-   Minimum Holding Current: 8 mA 
-   Minimum Voltage to Light Alarm LED: 5 V 
-   Alarm Reset Voltage: < 1 V 
-   Alarm Reset Time: One second 
-   Alarm Indicator: Integral indicator with 360º visibility
-   Operating & Storage Temperature: -40ºC to +70ºC

**Operation:**

-   Open-web casing that enables air to flow freely across a thermistor which measures the air temperature every two seconds 
-   A microprocessor stores the temperatures and compares them with pre-set values to determine whether a fixed upper limit - the alarm level - has been reached
-   Detectors the microprocessor uses algorithms to determine how fast the temperature is increasing

## Details

- **Price:** 225.0 USD
- **Type:** Fume Detectors
- **Tags:** 1st Class Eligible, Automotive/RV, Automotive/RV | Fume Detectors, Brand_Fireboy-Xintex, Marine Safety, Marine Safety | Fume Detectors

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 225.00 USD | In stock |

## Images

- Fireboy-Xintex Fixed Heat Detector w/Base [OMHD-04-DB-R] Fireboy-Xintex

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> Source: [Besafe1st](https://besafe1st.com/products/fireboy-xintex-rate-of-rise-heat-detector-w-base-omhd-04-db-r)
> Updated: 2026-06-04