Technically identical to the SM-4, this device is ideal for mercury determination at varying sites.
The SM-4 Mobile by Mercury Instruments has been developed on the basis of the well proven SM-4 mercury stack gas monitor. Its measurement principle and technique, its thermocatalytic reactor, the detector and the sample probe are identical with those of the stationary SM-4.
| Technical Specifications | |
|---|---|
| Measuring principle | thermocatalytic reduction at stack, Amalgamation (MI GoldTrap), cold vapor atomic absorption (CVAAS) at 253.7 nm |
| Measured component | Total mercury (ionic and elemental spe |
| UV-Source | Electrodeless low pressure mercury lamp (EDL) |
| Stabilization method | Reference beam method |
| Optical cell | Fused silica (Suprasil), l: approx. 230mm, heated approx. 45° |
| Measuring ranges | 0,05 μg/m³ to 500 μg/m³ Hg |
| Detection limit | 0,0001 μg/m³ (Detector); < 0,01 μg/m³ (System) |
| Response time T90 | Typically 180 sec |
| Calibration | automatic, with built in calibration gas generator for elementary Hg (option) automatic, with built in calibration gas generator for ionic Hg (option) manual, with built in heated fitting for feed of externally provided calibration gas (e.g. HOVACAL®) |
| Technical data | |
|---|---|
| Signal outputs | analogue: 4-20 mA (500 Ω max.) serial: RS232 Modbus RTU/RS485 (option) Ethernet (option) |
| Status output | 3 x pairs of relay contacts (dry contacts) |
| Remote access | Modem and SM-4 software (option) |
| Max. sample temperature | 250 °C |
| Ambient temperature range allowed | -5 to 40 °C |
| Sample line length | up to 90m |
| Power supply | 230 VAC / 50 Hz (110 VAC / 60 Hz option) |
| El. Power consumption | Analyzer cabinet: 450 VA Air condtioning cabinet: 1000 VA Heated sample line: 30 VA per meter |
| Dimensions (H x W x D) | Analyzer cabinet: 60 x 60 x 60 cm Air conditioning cabinet: 73 x 60 x 60 cm Probe: 75 x 38 x 34 cm Probe controller: 48 x 44 x 27 cm |
| Weight | Analyzer cabinet: 50 kg Air conditioning cabinet: 50kg Probe converter unit: 28kg; Probe controller: 14 kg |
| Air consumption | peak 35l/min, 6 bar (87 PSI) |
The continuous mercury analyzer SM-4 allows the compliance with future measurement obligations (Minamata convention & the European directives for thermal power plants and incinerators).
