HT Instruments HT38 – Circuit Breaker Finder

AUD $110.00 • ( AUD $121.00 inc. GST )

1 in stock

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HT38 is essential to identify the circuit breaker protecting a given socket on a panel board without having to dissect it. 

HT38 includes a signal generator (HT38T) to be connected to the socket under test and a signal receiver (HT38R) capable of  “exploring” all RCCBs of the panel board.

  • Visual LED indication and acoustic indication with variable tone
  • Localization of protection devices
  • Use in live circuits with a voltage up to 250VAC to earth
  • LED indication of low battery charge
  • Auto power off

PDF Datasheet  HT38 Datasheet

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Frequently questions from our customers:

Q: Why getting HT38?
A: Because it permits to detect the RCCB of the line without having to dissect it. Q: Should the receiver be brought into contact with the RCCB’s terminals?
A: No, you just need to put the receiver HT38R on the RCCB’s casing to detect the signal generated by the transmitter HT38T

Q: Which is the maximum distance between a socket and the corresponding RCCB to be detected?
A: The maximum distance between HT38T (connected to the above said socket) and HT38R is 300m (on networks with rated voltage of  110V L , N) and is 500m (on networks with rated voltage of  230V L , N)

Q: According which principle does the instrument work?
A: The instrument works according to PLT principle. HT38T releases a signal  into  the cable under  voltage which can be identified  by the receiver HT38R.

Weight 0.45 kg


General Specifications
Transmitter HT38T
Power supply 110V / 230VAC, 50/60Hz
Signal output current <20mA
External connection integrated Schuko Europlug
Distance from receiver max 500m (1640ft) (230V mains supply)
max 300m (984ft) (110V mains supply)
Operating temperature 0°C ÷ 40°C (32°F ÷ 104°F)
Operating humidity <80%RH
Storage temperature 0°C ÷ 50°C (32°F ÷ 122°F)
Storage humidity <95%RH
Size (L x W x H) 95 x 60 x 30mm (4 x 2 x 1in)
Weight 140g (5 ounces)
Receiver HT38R
Power supply 1x9V alkaline battery type IEC 6F22
Battery life approx. 19 hours
Auto Power OFF after 3 minutes’ idling
Operating temperature 0°C ÷ 40°C (32°F ÷ 104°F)
Operating humidity <80%RH
Storage temperature 0°C ÷ 50°C (32°F ÷ 122°F)
Storage humidity <95%RH
Size (L x W x H) 195 x 60 x 35mm (8 x 2 x 1in)
Weight 130g (5 ounces)
Mechanical protection IP40
General specifications
Safety IEC/EN61010-1
EMC IEC/EN61326-1
Insulation double insulation
Pollution level 2
Measurement category CAT III 250V
Max operating altitude 2000m (6562ft)

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