Vacuum

Turbo

Vendor	Model	Viscosity	Density	Vapor Pressure	Notes
Apiezon	AP303	29 mm²/s @ 40 °C
braycote	815Z				"mixture of small PTFE particles and a perfluorinated polyether liquid"
Dymavac	500	8.7 mm²/s @ 54 ° C		0-1 mm @ 172 ° C
Leybold	HE500				98-198-052 98-198-053 98-198-030
Leybold	Leybonol LVO-250	13 mm²/s @ 40 °C			Replaces HE500 Oil type: Synthetic oil (Ester oil with additives)
Pfeiffer	TL 011	10.5 mm²/s @ 40 °C	0.947 kg/dm3 at 20 °C

Notes:

McMaster sensor state 2024-07-17

Got burned by mismatched GP275 sensor to gauge
- I thought it was going to give an error like 40%, but its actually a zero point error => massive misreading / order of magnitudes
Inficon
- Found 3x BCG450 at flea market. 1 / 3 work
- Notes
MKS 901P might also go into ecosystem

GP275 controllers:

GP375
- Green display
- RS232 as DB9
- Circa 2009
275106, 275108
- Red display
- Cable seems to be uncommon
- Cable has AC + GP275 connection
Granville-Phillips 316 Vacuum Gauge Controller 316001
- IG controller
- Integrated power supply, controller
HP 59827A
- Rebranded GP
  - Somewhat similar to Granville-Phillips 316 Vacuum Gauge Controller 316001
- Half width IG controller (integrated PS / controller)
Granville Phillips 307001
- Full width IG controller (half PS, half controller)
- RS232 is optional card

Can get ones with integrated controllers. You can take the sensor out of them but it doesn't have the keying on the connector

Haven't played with DeviceNet, RS485, etc direct control on these

Interesting but tubes are relatively scarce on surplus market

Nice integrated display + sensor pluggable architecture

https://www.youtube.com/watch?v=hrZwKTwS9cs

HASTING INSTRUMENTS VACUUM GAUGE MODEL 760 110-220 VAC 760

TELEDYNE HASTINGS DUAL SENSOR VACUUM GAUGE MODEL HPM-2002-OBE

HVG-2020B

Teledyne Hastings HPM-2002 Digital Dual Vacuum Digital Gauge w/ RS232 Option