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Delivery is carried out as soon as possible after the order is placed.
Purpose
The DZI-3 detector is designed to measure the level of hydrocarbon gas contamination in indoor and outdoor environments where the presence of hydrocarbon gases and vapors is possible, such as near technological equipment, storage tanks, loading racks, main oil pipeline pumping stations, compressor stations, gas storage facilities, boiler houses, and other oil and gas industry sites.
Detector Description
The detector operates on an optical absorption principle using a dual-channel infrared photometer scheme. It is produced in an explosion-proof design housed in a corrosion-resistant aluminum alloy case. The case contains the sensor unit and cable gland. Atmospheric air enters the sensor’s measurement cell by free diffusion. The sensor’s protective filter prevents dust, dirt, and precipitation from entering the measurement cell. The current level of gas contamination is displayed on a digital indicator located in the detector’s case window, while LEDs indicate exceedance of threshold contamination levels.
The detector performs the following functions:
Order example:
DZI-3-M−1 — infrared gas contamination detector; calibrated for methane; output signal 0–20 mA current loop (3-wire), digital interface RS-485 (ModBus-RTU protocol).
| Parameters | Values | ||
| Explosion protection marking (GOST IEC 60079-1-2013) | 1 Ex db IIС T6 Gb | ||
| Explosion hazard zone class for sensor installation | According to Ex marking and GOST IEC 60079-14-2011 | ||
| Detected components | Hydrocarbon gases and vapors | ||
| Measurement concentration range | From 0 to 99 % LEL | ||
| Indication | measured concentration | 2-digit seven-segment indicator | |
| threshold exceedance | 2 red LEDs (Threshold 1, Threshold 2) | ||
| fault | 1 red LED (Fault) | ||
| Alarm threshold triggering range | From 0 to 99 % LEL | ||
| Basic measurement error limit Do | ± 5 % LEL | ||
| Response time T(90), max | 14 sec | ||
| Warm-up time (time to operational mode), max | 1 min | ||
| DC supply voltage | From 10 to 28 V (nominal 24 V) | ||
| Power consumption, max | 3 W | ||
| Output signal type (specified at ordering) | 1 * | 0–20 mA current loop (3-wire), digital interface RS-485 (ModBus-RTU protocol) | |
| 2 ** | Digital interface RS-485 (SKZ-12-Ex-01.M1 protocol) | ||
| 3 | Digital interface HART (optional) | ||
| Ambient temperature | From −40 to +60 °C | ||
| Ingress protection rating (IP code) | IP67 | ||
| Relative humidity (at 35 °C) | Up to 95 % without condensation | ||
| Dimensions (W×H×D) | 178×191×110 mm | ||
| Calibration interval | 1 year | ||
| Weight, max | 1.5 kg | ||
| Design service life | Sensor | 5 years | |
| Detector | 10 years | ||
| Warranty period | 2 years | ||
For connecting the DZI-3, the following cables are recommended: * ** Note: Other cross-sections, sheath and insulation materials for KUIN and KVIP cables are specified in separate cable datasheets. | |||
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