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Designed to be an affordable way to measure diesel emissions, the OM1 from Telonic Instruments is a battery-powered meter that detects the opacity of diesel smoke by a green light-emitting diode pulsed through the smoke plume at 625 times a second.

It is used in conjunction with Celesco emitter/detector heads from the 107 or 300 range, with the processing of end-of-line or in-line measurements depending on which head is used.

The photodetector has an integral amplifier and is connected to the meter via a screened multicore cable.

Opacity and smoke density are displayed on the OM1’s LCD in real time, together with peak values that can be reset by the user, whereas results are recorded and plotted on a standard laptop or PC.

Key features

  • Powered by four rechargeable AA batteries
  • Dimensions: 192 x 110 x 60mm
  • Weight: 700g
  • Digital signal processing provides accuracy and low drift
  • Microprocessor-based control functions, including auto calibration and self-test
  • Features 0.1 per cent resolution, dirty optics warning, remote control and logging software

Telonic Instruments

Telonic Instruments supplies a wide range of programmable power supplies, both AC and DC, a range of electrical safety testers, DC electronic loads, general-purpose test equipment including bench multimeters, and a range of RF filters and attenuators.

The AC power supplies are of linear amplifier and pwm design with outputs up to 40kVA depending on model. In addition to variable frequency, variable voltage outputs some of  the AC power supplies can simulate AC supply line faults and have a large number of measurement functions including current harmonics.

The laboratory DC supplies sold by Telonic have power outputs to 1MW with voltages up to 4,000V, and includes linear and switch mode designs. Telonic also supplies electronic loads for power supply testing. These can operate in static or dynamic modes and can simulate rapidly changing current demands on power supplies.

To complement the line-up of AC and DC power supplies even further, programmable DC and AC electronic loads are also available. They have a voltage range from 0–650V and power capability of up to 9kW. They are commonly used for power supply, battery, fuel cell and inverter testing.

Electrical safety testers are another Telonic speciality. Concentrating mainly on production test applications Telonic supplies AC and DC flash testers, insulation testers, leakage current testers and earth bond testers. Manual and programmable versions are available.

Telonic can also supply a range of RF filters and attenuators. The RF filter range encompasses custom-built fixed low pass and bandpass types and also tuneable bandpass and notch filters. Frequency range is up to 12GHz for fixed filters and 4GHz for tunables.

Telonic is an ISO9001-registered company and has been supplying electronics industry, research establishments and universities since 1968.

Many of the products in the Telonic range are also available for hire.

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