The Oliver IGD Tocsin 903 is a local display unit approved for Zone 1 and 2 Hazardous areas. The 903 is equipped as a standard 4-20 mA process transmitter as well as serial communication. The 903 can be retrofitted with any of the Oliver T102A range of gas detectors for gases such as O₂, CO, flammable gases, H₂, H₂S, CO₂, NO, NO₂, SO₂, Cl₂ etc. In addition the 903 can be used as a standard 4 to 20 field mount device to accept 4 to 20 mA inputs from a full spectrum of sensors such as pH, conductivity, pressure, flow, temperature etc.

Power supply is via 12 to 32 V d.c. or mains options. Signal output is via 4 to 20 mA or RS485 while two alarm and a fail relays are standard options allowing maximum standalone flexibility. Input ranges are automatically recognised for Oliver T102 detectors while other input ranges are user selectable. Zero, calibration and alarm setup is via one touch scroll button which is non-intrusive. Features include:-

* Easy setup without the need of computers.

Specifications include nominal supply voltages: 24 V d.c or 220 V a.c. Operating temperature range: 0 to 50°C, IP66 rated enclosure, accuracy within 5% FSD at a resolution 1% of FSD. Inputs are 4 to 20 mA or pellister, output: 4 to 20 mA, RS485, 3 X SPCO relay, display is a 14 mm 4-digit red LED, response time 10 seconds (gas) T90. The 1,7 kg device measures 130 x 110 mm and has Approvals: EEx d 11C T6, CE 0518, Ex 112 D G, Sira 02ATEX1271X, ATEX 94/9/EC, EN 50014, EN50018, EN 50281-1-1.

For more information contact Stuart Truebody, Environmental Process Analytics, 082 563 7204, envirosa@mweb.co.za