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| Brand | Bacharach |
|---|---|
| Origin | USA |
| Model | 7100P |
| Measurement Range | 0–100 ppm / 0–1000 ppm (auto-ranging) |
| Sensor Type | Miniature Zirconia (ZR-400) |
| Accuracy | ±3 ppm or ±2.0% of reading (whichever is greater) |
| Response Time | <15 s T90 at 500 mL/min |
| Sample Interface | 1/8" NPT female |
| Enclosure Rating | Front Panel — NEMA 4 (IP66), Electronics Chassis — NEMA 1 (IP20) |
| Display | 0.75" LED, dual-color (green = normal/online, yellow = fault) |
| Alarms | Two user-configurable relay alarms + one fixed system-fault relay |
| Analog Outputs | 0–1 VDC, 0–5 VDC, 0–10 VDC, and 4–20 mA |
| Digital Interface | RS-232 service port |
| Power Supply | 90–264 VAC or 24 VDC |
| Operating Temperature | 5–40 °C (41–104 °F) |
| Relative Humidity | 0–95% RH (non-condensing) |
| Weight | <2.2 kg |
| Brand | Bacharach |
|---|---|
| Origin | USA |
| Model | 7100 |
| Measurement Range | 0–100 ppm / 0–1000 ppm |
| Sensor Type | Miniature Zirconia (ZR-400) |
| Accuracy | ±2.0% of reading or ±3 ppm (whichever is greater) |
| Response Time (T90) | <10 s at 500 mL/min |
| Display | 0.75" LED numeric |
| Enclosure Rating | Front panel NEMA 4 (IP66), Electronics chassis NEMA 1 (IP20) |
| Operating Temperature | 5–40°C |
| Humidity | 0–95% RH non-condensing |
| Power Input | 90–264 VAC or 24 VDC |
| Analog Outputs | 0–1 VDC, 0–5 VDC, 0–10 VDC, 4–20 mA |
| Digital Interface | RS-232 service port |
| Relay Outputs | 2 field-adjustable alarm relays + 1 fixed system fault relay |
| Sample Connection | 1/8" NPT female |
| Weight | <2.2 kg |
| Brand | AlphaOmega |
|---|---|
| Origin | USA |
| Model | 2520 |
| Measurement Ranges | 0–1%, 0–5%, 0–10%, 0–25%, 0–50%, 0–100% O₂ |
| Accuracy | ±0.1% FS |
| Linearity | ±0.1% FS |
| Response Time (t₉₀) | <10 s |
| Sensor Type | Electrochemical (O₂-specific) |
| Sample Temperature | 0–50 °C |
| Sample Pressure | 0.1–1 kg/cm² |
| Sample Flow Rate | 0.5–1.0 L/min |
| Temperature Compensation | Built-in |
| Display | 3½-digit LCD |
| Power | Rechargeable NiCd battery + universal AC adapter (battery charges during AC operation) |
| Enclosure | NEMA 1-rated polycarbonate |
| Dimensions | 5.8" H × 6.7" W × 3.4" D |
| Weight | <1 kg |
| Inlet/Outlet | Quick-connect fittings |
| Integrated Components | 12 VDC sampling pump, flowmeter with control valve at outlet |
| Analog Output | None |
| Brand | AlphaOmega |
|---|---|
| Origin | USA |
| Model | ZRO 2000 |
| Measurement Range | 0–100% O₂ (ppb–100% trace-to-full scale) |
| Accuracy | ±2% of reading (subject to clean, non-reducing sample gas) |
| Operating Temperature | 10–40 °C |
| Sample Gas Temperature Limit | ≤50 °C |
| Sample Pressure Range | 0.007–0.035 kg/cm² (≈1–5 psig) |
| Relative Humidity Limit | ≤85% RH |
| Power Input | 90–264 VAC, 50/60 Hz |
| Analog Output | Selectable 0–20 mA or 4–20 mA DC |
| Alarm Outputs | Two SPDT relays (10 A @ 30 VDC / 115–230 VAC) |
| Display | 6-digit LCD, 0.7" character height (17.8 mm) |
| Enclosure | Aluminum, NEMA 1-rated |
| Dimensions | 13" H × 10.71" W × 6.3" D |
| Sample Connection | 1/4" stainless steel compression fittings |
| Sensor Type | Heated zirconia electrochemical cell |
| Internal Audible Alarm | Yes, with front-panel mute switch |
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