![](https://coimages.sciencemuseumgroup.org.uk/341/522/large_thumbnail_smg00081743.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/341/522/large_thumbnail_smg00081743.jpg)
![](https://coimages.sciencemuseumgroup.org.uk/349/925/large_thumbnail_smg00081728.jpg)
Air position indicator, Mk 1B.
![](https://coimages.sciencemuseumgroup.org.uk/397/195/large_thumbnail_smg00081727.jpg)
Ground position indicator, Mk 4.
![](https://coimages.sciencemuseumgroup.org.uk/348/274/large_thumbnail_smg00233482.jpg)
Oxygen economiser flow indicator.
![](https://coimages.sciencemuseumgroup.org.uk/339/401/large_thumbnail_smg00178187.jpg)
Whipple patent temperature indicator
1900-1982
![](https://coimages.sciencemuseumgroup.org.uk/299/403/large_thumbnail_smg00065785.jpg)
Maihak engine indicator No.7077
![](https://coimages.sciencemuseumgroup.org.uk/354/677/large_thumbnail_smg00051525.jpg)
McCallam's patent distance indicator, 1864
1864
![](https://coimages.sciencemuseumgroup.org.uk/372/221/large_thumbnail_smg00091792.jpg)
Roller blind altitude indicator
![](https://coimages.sciencemuseumgroup.org.uk/353/304/large_thumbnail_smg00178432.jpg)
Whipple Temperature Indicator serial no. C620290
1957
![](https://coimages.sciencemuseumgroup.org.uk/347/856/large_thumbnail_smg00190757.jpg)
Experimental remote indicator meter
![](https://coimages.sciencemuseumgroup.org.uk/299/405/large_thumbnail_smg00065793.jpg)
Engine indicator by Thompson & Bushnell
![](https://coimages.sciencemuseumgroup.org.uk/302/508/large_thumbnail_smg00065799.jpg)
McNaught type steam engine indicator by J. Hannan
![](https://coimages.sciencemuseumgroup.org.uk/444/108/large_thumbnail_smg00224525.jpg)
High voltage indicator
![](https://coimages.sciencemuseumgroup.org.uk/462/686/large_thumbnail_smg00279957.jpg)
Indicator, type 48A
![](https://coimages.sciencemuseumgroup.org.uk/387/242/large_thumbnail_smg00085847.jpg)
"Universal" Pivotless Moving Coil Indicator No.1888736
1966
![](https://coimages.sciencemuseumgroup.org.uk/492/186/large_thumbnail_smg00314406.jpg)
German DVG indicator value of World War II
![](https://coimages.sciencemuseumgroup.org.uk/334/906/large_thumbnail_smg00082307.jpg)
Indicator Speed (German)
![](https://coimages.sciencemuseumgroup.org.uk/334/980/large_thumbnail_smg00181907.jpg)
Revolution indicator (Smith's)
![](https://coimages.sciencemuseumgroup.org.uk/334/891/large_thumbnail_smg00081254.jpg)
Jet pipe temperature indicator (Smith's)
![](https://coimages.sciencemuseumgroup.org.uk/341/234/large_thumbnail_smg00074710.jpg)
Indicator flap (Smiths) Ser.no.79106
![](https://coimages.sciencemuseumgroup.org.uk/396/197/large_thumbnail_smg00078837.jpg)
Air-driven indicator - experimental
![](https://coimages.sciencemuseumgroup.org.uk/472/319/large_thumbnail_smg00305568.jpg)
Eye-ball indicator
1920
![](https://coimages.sciencemuseumgroup.org.uk/439/554/large_thumbnail_smg00224446.jpg)
illuminated moving scale indicator with transformer and operating switch
![](https://coimages.sciencemuseumgroup.org.uk/439/230/large_thumbnail_smg00114687.jpg)
Richards Steam Engine Indicator
![](https://coimages.sciencemuseumgroup.org.uk/443/995/large_thumbnail_smg00224350.jpg)
Crompton thermal maximum demand indicator
![](https://coimages.sciencemuseumgroup.org.uk/209/212/large_thumbnail_cd0475_004_081219_1996_10_1035_ferranti_9c_aircraft_instrument.jpg)
Ferranti elevation range indicator
1965
![](https://coimages.sciencemuseumgroup.org.uk/299/877/large_thumbnail_smg00065804.jpg)
"Simplex" external spring steam engine indicator, Type B. In case.
![](https://coimages.sciencemuseumgroup.org.uk/302/816/large_thumbnail_smg00065897.jpg)
Tabor steam engine indicator, in case with key
![](https://coimages.sciencemuseumgroup.org.uk/298/545/large_thumbnail_1890_0083__0005_.jpg)
Watt's steam engine indicator
![](https://coimages.sciencemuseumgroup.org.uk/472/301/large_thumbnail_smg00305526.jpg)
Indicator, two button
![](https://coimages.sciencemuseumgroup.org.uk/727/362/large_thumbnail_smg00360869.jpg)
Honeywell `Electronik 15' Temperature Indicator
1971
![](https://coimages.sciencemuseumgroup.org.uk/724/873/large_thumbnail_smg00360485.jpg)
Control Surface Position Indicator
![](https://coimages.sciencemuseumgroup.org.uk/724/877/large_thumbnail_smg00360489.jpg)
Fuel Quantity Indicator
![](https://coimages.sciencemuseumgroup.org.uk/724/879/large_thumbnail_smg00360491.jpg)
Nozzle Area Indicator
![](https://coimages.sciencemuseumgroup.org.uk/210/865/large_thumbnail_cd0442_008_081106_1996_10_955_ferranti_3d_high_voltage_indicator.jpg)
Ferranti type 1 high voltage indicator
1935-1950
![](https://coimages.sciencemuseumgroup.org.uk/533/852/large_thumbnail_smg00357648.jpg)
Locked/Free Indicator
![](https://coimages.sciencemuseumgroup.org.uk/299/404/large_thumbnail_smg00065790.jpg)
Darke's high speed steam engine indicator no.421
1879-1888
![](https://coimages.sciencemuseumgroup.org.uk/441/199/large_thumbnail_smg00021632.jpg)
Kenyon's pistonless steam engine indicator, 1878
1878-1890
![](https://coimages.sciencemuseumgroup.org.uk/302/506/large_thumbnail_smg00065797.jpg)
Steam engine indicator with concentric drum
![](https://coimages.sciencemuseumgroup.org.uk/302/509/large_thumbnail_smg00065805.jpg)
McNaughts' steam engine indicator 0.5 sq. ins.
![](https://coimages.sciencemuseumgroup.org.uk/208/459/large_thumbnail_cd0501_020_090210_1996_10_1088_ferranti_16b_electric_line_overload_indicator_stand.jpg)
Electric line overload indicator
![](https://coimages.sciencemuseumgroup.org.uk/302/507/large_thumbnail_smg00065798.jpg)
Simplex patent steam engine indicator
![](https://coimages.sciencemuseumgroup.org.uk/727/366/large_thumbnail_smg00360872.jpg)
Foster Cambridge Temperature Indicator
1970-1979
![](https://coimages.sciencemuseumgroup.org.uk/32/14/large_thumbnail_1951_0401.jpg)
Rudder angle indicator and junction box
1948-1951
![](https://coimages.sciencemuseumgroup.org.uk/350/242/large_thumbnail_smg00182262.jpg)
Short's gas indicator, made by E. F. Gurnett
![](https://coimages.sciencemuseumgroup.org.uk/378/734/large_thumbnail_smg00062223.jpg)
Magnetic field indicator in chrome-plated metal case
1950-1970
![](https://coimages.sciencemuseumgroup.org.uk/451/227/large_thumbnail_smg00240455.jpg)
KEN-RAD magic-eye tuning indicator, type 6E5
![](https://coimages.sciencemuseumgroup.org.uk/481/20/large_thumbnail_smg00100554.jpg)
Combined Dial and "Men-on" indicator
![](https://coimages.sciencemuseumgroup.org.uk/443/992/large_thumbnail_smg00224346.jpg)
"Atkinson-Schattner" maximum demand indicator
![](https://coimages.sciencemuseumgroup.org.uk/356/487/large_thumbnail_smg00116512.jpg)