Dynagard 25 - Oxygen (O2)
The Dynagard 25 Series accurately measures O2 levels using the ZD 21 sensor. Each alarm can be adjusted separately. The alarm point values can be freely adjusted within the detection range of the transmitter.
The ZD 21 is a powerful transmitter for the detection of oxygen, using an amperometric sensor based on an electrochemical zirconium dioxide oxygen pump cell. The detection principle features a good longterm stability and selectivity.
The controller provides four voltage-free relays for the three alarms and one fault warning. The relays may be used to control additional alarm devices like lights or horns. They can even prompt specific counter measures to prevent or limit dangers from gases or vapors.
Key Features:
- Extremely stable sensor responds quickly to any change in O2
- concentrations and is unaffected by high exposure to CO2
- Adjustable alarm points
- On-board relays for external controls
- Fast recovery from barometric pressure, humidity or temperature
- Minimal signal loss over time reduces the need for frequent calibration
- Local display, horn and strobe
Temperature Range:
- +32°F to +122°F
Humidity:
- 0 to 99% r.h. non-condensing
Pressure:
- 920 to 1,100 hPa
Power Supply:
- 24 V DC wall pack
|
Specification |
Details |
|---|---|
|
Gas |
Oxygen (O₂) |
|
Detection Range |
0–25% volume |
|
Measuring Principle |
Zirconia oxide (ZD) |
|
Gas Supply |
Diffusion |
|
Expected Sensor Life |
Greater than 5 years |
|
Temperature |
+32 to +122 ˚F / 0 to +55 ˚C |
|
Humidity |
0 to 99% r.h. non-condensing |
|
Pressure |
920 to 1,100 hPa |
|
Output Signal |
Linear 4–20 mA |
|
Power Supply |
24 V DC wall pack |
|
Display |
3-digit LED display for linear measurement values; 1 LED green – operational status; 1 LED yellow – fault; 3 LEDs red – alarm; display of max/min values |
|
Horn |
Low: 70 dB at 10 ft (UL 464); High: 83 dB at 10 ft (UL 464) |
|
Strobe |
Light output on axis (cd); Low: 35; High: 68 |
|
Alarms |
3 alarm points, user adjustable within detection range; latching/non-latching; resettable/non-resettable; adjustable hysteresis; delay time 0–2 minutes; adjustable thresholds |
|
Relays |
3 alarm points, 1 fault – voltage free; Factory settings: A1 – strobe, A2 – open, A3 – horn, Fault – open; Voltage: 250 V AC 50/60 Hz or 250 V DC max |
|
Dimensions (H x W x D) |
11 x 7 x 2.75 in / 27.9 x 17.8 x 7 cm |
|
Weight |
6.5 lbs / 2.95 kg |
|
Specification |
Details |
|---|---|
|
Gas |
Oxygen (O₂) |
|
Detection Range |
0–25% volume |
|
Measuring Principle |
Zirconia oxide (ZD) |
|
Gas Supply |
Diffusion |
|
Expected Sensor Life |
Greater than 5 years |
|
Temperature |
+32 to +122 ˚F / 0 to +55 ˚C |
|
Humidity |
0 to 99% r.h. non-condensing |
|
Pressure |
920 to 1,100 hPa |
|
Output Signal |
Linear 4–20 mA |
|
Power Supply |
24 V DC wall pack |
|
Display |
3-digit LED display for linear measurement values; 1 LED green – operational status; 1 LED yellow – fault; 3 LEDs red – alarm; display of max/min values |
|
Horn |
Low: 70 dB at 10 ft (UL 464); High: 83 dB at 10 ft (UL 464) |
|
Strobe |
Light output on axis (cd); Low: 35; High: 68 |
|
Alarms |
3 alarm points, user adjustable within detection range; latching/non-latching; resettable/non-resettable; adjustable hysteresis; delay time 0–2 minutes; adjustable thresholds |
|
Relays |
3 alarm points, 1 fault – voltage free; Factory settings: A1 – strobe, A2 – open, A3 – horn, Fault – open; Voltage: 250 V AC 50/60 Hz or 250 V DC max |
|
Dimensions (H x W x D) |
11 x 7 x 2.75 in / 27.9 x 17.8 x 7 cm |
|
Weight |
6.5 lbs / 2.95 kg |