LEYBOLD brand guide / Product family
TTR 91, 96 and 97 RN active transmitters offer filament and output choices.
THERMOVAC TTR 91 RN uses a tungsten/rhenium filament; TTR 96 RN and TTR 97 RN use different corrosion-resistant filament materials. Output variants can change the low-pressure limit. Pirani readings depend on the gas. Check the output transfer function, connector pinout, setpoints and controller input rather than selecting from pressure range alone.
Select filament material, pressure range, gas correction, output and connector together.
Compare values with their stated gas, frequency and configuration conditions. A blank specification means it needs confirmation. Listed equipment is subject to a quotation; inclusion here does not indicate stock.
| Model | Measurement principle | Pressure range | Vacuum connection |
|---|---|---|---|
| Leybold THERMOVAC TTR 91 RN Pirani Vacuum Gauge | Active Pirani; gas-dependent thermal conductivity | 5 × 10⁻⁴–1000 mbar, standard Leybold analogue output | DN16 KF, DN25 KF, DN16 CF and other documented connection variants |
| Leybold THERMOVAC TTR 96 RN Pirani Vacuum Gauge | Active Pirani; gas-dependent thermal conductivity | 1 × 10⁻⁴–1000 mbar, standard Leybold analogue output | DN16 KF, DN25 KF, DN16 CF and other documented connection variants |
| Leybold THERMOVAC TTR 97 RN Pirani Vacuum Gauge | Active Pirani; gas-dependent thermal conductivity | 5 × 10⁻⁴–1000 mbar, standard Leybold analogue output | DN16 KF, DN25 KF, DN16 CF and other documented connection variants |
LEYBOLD
LEYBOLD
LEYBOLD
Open the model page for its specifications and available manufacturer downloads. Match the full model, suffix and revision to the equipment being supplied. Keep installation limits and performance test conditions with the figure when comparing alternatives.
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Send the process, working pressure, gas, required capacity and electrical supply. For measurement, include the range, connection, output and controller. We can confirm the model, accessories and documentation for your quotation.
Compare the stated conditions as well as the values. A missing specification is not a zero rating; confirm suitability with Girovac.
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