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 - When used with a SR-24 Bluetooth®-enabled locator, you can 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 / New Zealand

Other Specifications

Max Power 10 Watts
Bluetooth® Max Wireless Range 200 yards (183 meters)

Batteries Sold Seperately

Ordering Information

Catalog Number Description Weight
lb. kg
49338 ST-33Q+ Line Transmitter with Bluetooth®  11.1  5.0  Buy Now
26168 SeekTech ST-33QR Transmitter  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, (N. America)  1.70  Buy Now
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