S-355 Compact Electric Blasting Machine
The MTi Group S-355 Compact Electric Blasting Machine is a professional's choice for reliable initiation. With swift, charge-ready design and integral safety checks, it optimizes your blasting experience. Its durable and portable features make it suitable for any environment.
Live pricing and same-day-ship priority once you're in. Setup takes 60 seconds — we just need to confirm you're a real operation.
- P.O.
Why S-355 Compact Electric Blasting Machine
350 VDC firing energy
Delivers 350 volts DC for reliable initiation of series-connected electric detonators.
Why it matters: Enough energy to fire large series circuits with margin. Covers most surface and underground rounds.
Heavy-duty construction
Steel and polymer housing built for years of daily use on active blast sites.
Why it matters: Takes the knocks of real field conditions without compromising the firing circuit inside.
Immediate circuit check
Built-in continuity tester confirms your circuit before you fire. One-button check.
Why it matters: Catch a broken wire or bad splice before committing to the shot. No extra meter needed.
Secure switch operation
Key-switch arming with guarded fire button. Two deliberate actions required to fire.
Why it matters: Prevents accidental or unauthorized initiation. Safety protocol is built into the machine.
Replaceable 9V battery
Powered by a standard 9V battery. Field-replaceable in seconds.
Why it matters: No downtime waiting for a recharge. Swap and fire.
Portable belt loop
Compact size with belt loop for hands-free carry across the bench.
Why it matters: Keeps the machine on you, not in the truck. Ready to hook up and fire without a trip back.
Built for the bench.
Pocketable power
One of the smallest electric blasting machines in our line. Fits in a vest pocket.
Reliable firing
Small footprint, no compromise on firing reliability.
Specs, storage & more.
| FIRE CIRCUIT | ARMED INDICATOR: |
| DETECTION | TEST SIGNAL: INDICATION: |
| FIRING | CONTINUITY: |
| DIMENSION | WEIGHT: CASE MATERIAL: HARDWARE: INGRESS: OPERATING TEMP: STORAGE TEMP: COLORS: |
| BATTERY | LIFE: |
| CONNECTION | SWITCHES: CARRYING: BATTERY: |
| OUTPUT | ABORT: |
| Battery type | 9V |
| Output voltage | 350 |
| Output energy (joules) | 5 |
| Max resistance (ohms) | 230 |
| Rated cap count | 110 |
| Firing cycles per battery | ~300+ |
| Initiation type | Electric |
| Length | 9" |
| Width | 4" |
| Height | 3" |
| Weight | 1lbs |
| Waterproof | Yes |
| MSHA approved | No |
| CE approved | No |
| Pack size | Each |
Pick the right machine.
Every shot.
Detailed Specifications
 HB-10 Electric Initiator
|
 HB-55 Electric Blasting Machine
|
 S-355 Compact Electric Blasting Machine
|
 HB-SBS Blasting Machine - Dual Initiation
|
 HB-320 Rugged Waterproof Blasting Machine
|
 S-412 Blasting Machine with Circuit Continuity
|
 HBR-20P Blasting Machine - MSHA Approved
|
 S-2 Non-Electric Blasting Machine
|
 S-3 Powerful Blasting Machine
|
 S-27 Blasting Machine
|
 HR-3 Mechanical Starter
| |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Initiation Type | Electric | Electric | Electric | Dual Initiation | Electric | Electric | Electric | Non-Electric | Dual Initiation | Non-Electric | Mechanical |
| Firing Cycles Per Battery | ~300+ | ~300+ | ~300+ | ~250+ | ~150+ | ~250+ | ~200+ | — | ~250+ | — | — |
| Battery Type | 9V | 9V | 9V | 9V | AA | 9V | AA | — | 9V | — | — |
| Output Volts DC | 150 | 225 | 350 | 450 | 330 | 400 | 350 | 400 x 2 | 400 | 400 | 400 |
| Output Joules | 1.25 | 4 | 5 | 5 | 19 | 12 | 6.125 | 12 x 2 | 12 | 12 | 12 |
| Initiation Resistance (ohms) | 50 | 135 | 230 | 250 | 220 | 240 | N/A | — | 240 | — | — |
| Estimated Single Series Caps | 20 | 62 | 110 | 120 | 105 | 115 | 20 | — | 115 | — | — |
| Waterproof | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | — |
| MSHA Approved | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Rapid Charging | ✓ | ✓ | ✓ | ✗ | ✓ | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ |
| Detachable Belt Loop | ✓ | ✗ | ✓ | ✗ | ✗ | ✓ | ✓ | ✓ | ✓ | ✗ | ✗ |
| Continuity Indicator | ✗ | ✓ | ✓ | ✗ | ✗ | ✓ | ✗ | ✗ | ✓ | ✗ | ✗ |
| CE Approved | ✓ | ✗ | ✗ | ✗ | ✓ | ✗ | ✗ | ✗ | ✗ | ✗ | ✗ |
Swipe to see all columns →
Pick the HB-10 when you are firing small construction shots and want a compact, hand-held electric initiator. 50-ohm capacity, 9V battery, fits on your belt. Roughly 20 caps per single series.
Pick the HB-55 for mid-sized electric shots that need built-in circuit continuity verification. 135 ohm capacity, fires roughly 62 caps in single series.
Pick the S-355 when you need 230-ohm capacity in a compact form factor. Continuity indicator built in, rapid charge, fires roughly 110 caps per single series.
Pick the HB-SBS when crews switch between electric and shock-tube circuits. Auto-detects what is connected. 250-ohm electric capacity, fires roughly 120 caps single series.
Pick the HB-320 for large production circuits and harsh environments. 220-ohm capacity, 19-joule output, AA-battery powered, CE approved. Roughly 105 caps single series.
Pick the S-412 for large electric shots where pre-fire continuity verification is critical. 240-ohm capacity, continuity indicator, fires roughly 115 caps single series.
Pick the HBR-20P for underground coal and gassy metal/non-metal mines. MSHA-approved permissible unit, auto-shunts output 4.5–8 ms after firing. AA battery, roughly 20 caps single series.
Pick the S-2 for shock-tube firing on large surface benches. Two 400-volt outputs, 12 joules each. Immune to stray current and RF energy.
Pick the S-3 when you need a high-energy dual-initiation machine. 12-joule output, 240-ohm capacity, continuity indicator. Fires roughly 115 caps single series.
Pick the S-27 as a robust non-electric shock-tube firing device. 400-volt, 12-joule output. Heavy-duty build for production benches.
Pick the HR-3 when you want a battery-free mechanical starter for shock-tube initiation. No electronics, no batteries, no charging — a reliable backup for any non-electric circuit.
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