The RIDGID® ST-33Q+ Line Transmitter with Bluetooth is the ideal transmitter for inducing current onto a target line. It will also direct connect using any frequency from 10Hz to 490kHz* with power up to 10 Watts. The ST-33Q+ also allows the flexibility of using D-Cell alkaline batteries or 18V rechargeable RIDGID batteries for minimal interruptions on the job. The new Bluetooth feature on the ST-33Q+ allows you to finish complex locates faster by wirelessly changing the transmitted frequency from the SR-24 receiver from up to 200 yards away.


  • Distance - Induce over 8 times more current than traditional transmitters. More current means you can walk and trace further than ever before.
  • Versatility - Power options include Lithium-Ion 18 V rechargeable battery, six D-cell batteries, or an external 10-28 VDC power source.
  • Accuracy - Induce more current at lower frequencies. Lower frequencies are less prone to jump onto other lines in congested areas reducing distortion and increasing accuracy.
  • Speed - Use with a SR-24 Bluetooth-enabled locator, to control the ST-33Q+ settings wirelessly from the SR-24 receiver. Change transmitted frequency remotely from up to 200 yards away.



Direct Connect (pre-programmed) 128 Hz, 1 kHz, 8 kHz, 33 kHz, 93 kHz, 262 kHz.*
Direct Connect (user programmed) Any Frequency from 10 Hz – 490 kHz*
Induction 8 kHz or 33 kHz.
* Up to 93 kHz for devices sold in Europe and Australia and New Zealand.

Other Specifications

Max Power 10 watts.
Bluetooth Max Wireless Range 200 yards (183 m).

Batteries sold separately.

Ordering Information

Catalog Number Description Weight
lb. kg
49338 ST-33Q+ Line Transmitter with Bluetooth  11.1  5.0  Buy Now


Catalog Number Description Weight
lb. kg
20973 SeekTech 4” (100 mm) Inductive Signal Clamp  0.90  Buy Now
44853 Set of (2) 2.0Ah Batteries & (1) 120V Charger  1.70  Buy Now
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