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Product Features
  • Maximizes the safety and efficiency of your mix of fixed gas detectors
  • Provides reliable gas leak detection in a wide range of applications and working environments
  • Minimizes the risks of false alarms
  • Enables quicker, easier installation
  • Minimizes cost of ownership and saves time
  • Increases ease of use with advanced set-up and test tools.
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information

The SearchZone Sonik acoustic gas leak detector complements Honeywell’s established portfolio of gas detection devices, adding ultrasonic technology to a reliable mix of point and open-path gas detectors. Thanks to its robust sealed solid-state sensor that doesn’t need calibration and can withstand the harshest weather conditions, the Searchzone Sonik delivers reliable gas leak detection, even in the noisiest environments, prevents false alarms, and reduces the cost of ownership. A sophisticated App on a hazardous area Bluetooth device delivers remote access for set-up, interrogation and maintenance, supported by an advanced test-tool enabling testing from the ground - no need to work at height.

Quick Specs

  • Field of Coverage: ± 90° solid angle from on axis to 6dB down
  • Area of Coverage: typically 20m (65ft) on-axis radius
  • Operating Temperature: -55°C to +75°C (-76°F to +167°F)
  • SIL2 to EN61508
  • Digital Communications: Modbus RTU RS485, HART®, Bluetooth
  • Painted Stainless Steel or Aluminium options
  • Cable entries: 2 x M25 or 2 x ¾ NPT.

A robust and reliable gas-leak detection device, Searchzone Sonik will efficiently “hear” the loss of containment of any high-pressure gas within its listening zone. As it responds to the ultrasonic sound pressure level produced by pressurized gas leaks, it is therefore unaffected by environmental conditions. 

Searchzone Sonik is factory calibrated. Its robust sealed design with no moving parts and the advanced solid-state sensor allow for mounting in any orientation, even in the harshest environments. The acoustic gas leak detector will respond quickly to a gas leak within a sensing range radius of typically 20m (65 ft), dependent upon background noise.  

No False Alarms – the high-end spectral analysis delivers best-in-class detection of high-pressure gas leaks in real-world environments. 

Wide Zone Coverage – typically 20m (65 ft) detection radius, dependent upon background ultrasonic noise levels.

Complements Existing Gas Detectors – the Searchzone Sonik seamlessly integrates with existing point-and-open path gas detectors, thus creating the optimal gas detection mix. 

No Moving Parts – the solid-state sensor works flawlessly even in the harshest environments and doesn’t need additional calibration. 

Simple Installation and Alignment – the Platform Universal Mount with 3 graduated degrees of freedom enables easy mechanical set-up.

Bluetooth Compatibility – set-up and interrogation from ground level are available via Bluetooth by using the Honeywell Platform application on IS mobile phones. Depending on the mobile device, the range can reach up to 20 m (65 ft).

Instrument Status at a Glance – the Searchzone Sonik features a bright signal light – green, yellow, red, or blue -  providing clear indication of the instrument status.

Full Operational Logs – enables post-event analysis to assess overall performance and allows security checks.

Fast Commissioning – the Searchzone Sonik App allows users to save configurations and upload to other Searchzone Soniks for quick and easy commissioning.

Product Specification



Model Searchzone SonikTM Ultrasonic Gas Leak Detector
Sensor Type Tuned piezoelectric transducer
Detection Method Sound Pressure Level at sensor
Frequency Range 18 kHz to 70 kHz
Dynamic Range 40 dB to 140 dB
Calibration Factory calibrated
Detector Range Typically 20 m on-axis radius (background noise dependant)
 Recommended Alarm Setting 6 dB above background noise
Cone of Detection +/- 90 degrees (Standard Mode), +/- 20 degrees (Focus Mode); solid angle from on axis to 6 dB down
Speed of Response Sensor response 1 s; Programmable Verification time from 0s to 600 s.
Electronic Self Test Built in test diagnostics
Storage Temperature -55° C to +75° C (-67 °F to 167 °F)
Operating Temperature -55° C to +75° C (-76 °F to +167 °F)
Operating Humidity 0 to 100% RH
Warm-up Time Less than 5 minutes (operational)
Power Supply & Maximum Power Consumption 24Vdc nominal (18 Vdc to 32 Vdc); 167mA at 24 Vdc (3 W), 4W for ambient operating temperature -30°C and above, 15 W for ambient operating temperature below -30°C (heater is active)
Cable entries 2 x M25 or 2 x 3/4” NPT
Outputs Relays (1 fault, 2 Alarm) – contact rating 2 A (resistive load). Fully configurable 4 – 20 mA isolated, sink or source (maximum loop resistance 600 ohms); Fault < 1 mA, Warning 3 mA, Over-range 22 mA. Linear configurable output corresponding to Sound Pressure Level.
Analog Thresholds 0 mA Fault, 2 mA Inhibit, 4-20 mA Normal Operation
Digital Communications Modbus RTU RS-485. HART® with handheld communicator or hardwired. Bluetooth to smartphone or tablet (20 m range, device dependent).
Event Logs Time stamped
Visual Indication High Visibility light ring; green/yellow/red/blue multi-colour to indicate detector status. Green (normal) indication can be disabled via Searchzone Sonik App.
Dimensions Instrument: 103 dia x 235 x 176 mm Standard Mount: 165 x 165 x 127 mm Large Mount: 210 x 210 x 127 mm
Enclosure Material Stainless Steel 316L; with paint finish
Standard Adjustable Mounting Bracket Stainless Steel. Graduated to enable Searchzone Sonik to be simply mounted and aimed in 5 degree steps, weight 2.9 kg (6.4 lbs)
Large Adjustable Mounting Bracket Stainless Steel. Graduated to enable Searchzone SonikTM to be simply mounted put on one line and aimed in 5 degree steps, weight 3.5 kg (7.7 lbs)
Interfaces Bluetooth® non-intrusive connection to suitable mobile device running the SearchzoneTM Sonik mobile app. Range up to 20 m (mobile device dependant).
Vibration 2 - 60 Hz, maximum peak to peak amplitude 1 mm
Ingress Protection (IP) Rating IP 66 / 67 (Type 4X), according to NEMA 250
Core Approvals (pending) EN 50270: 2015 (EMC) IEC/EN 61000-6-4; EMC Directive 2014/35/EU IEC/EN/UL/CSA 61010 (Electrical Safety) FCC RoHS, China RoHS
Safety Approvals

ATEX II 2 GD Ex db ia IIC T4 Ex tb IIIC T85°C Ex db eb ia IIC T4 Tamb -55 to +75°C (-67 to 167 °F)

cULus Class I, Div 1, B, C & D Class II/III, E, F & G (pending) Tamb -55 to +75°C Class I Zone 1 AEx d ia IIC T4 (USA) Class I Zone 1 Ex d ia IIC T4 (Canada)

IECEx Ex d b ia IIC T4 Ex tb IIIC T85°C Ex db eb ia IIC T4 Tamb -55 to +75°C (-67 to 167 °F)

Marine Approvals (pending) Type approved to DNV, BV, Lloyds, ABS Location Classes: Temp B, Humidity B, Vibration A & C, EMC B
Other Approvals (pending) BT SIG (Bluetooth), RED, FCC+, country-specific wireless approvals EN 61508:2010 SIL2 -55 °C to +75 °C, independently assessed by TÜV CCCF Inmetro CU TR-Ex (Eurasian Customs Union), Tamb -60 to +85°C (-76 to 185 °F)
Bluetooth communication security Certificate-based mutual authentication. Encryption to AES128
Warranty Period 36 months from date of shipment.
Adjustable Mounting Bracket Standard bracket (included). Large bracket (optional)
Sunshade Plastic (included), stainless steel sunshade (optional)
Hand-Held Tester Hand-Held Sonik Test Unit. featuring leak seeking function. Check with Honeywell for availability.
Hand Held Communicator I.S. Android Smartphone. Download the Searchzone SonikTM App from Google Play Store
Part Number Description
SZSK-SNGXX Searchzone Sonik Ultrasonic Gas Leak Detector, SST, 3/4NPT with adjustable mount and sunshade
SZSK-SMGXX Searchzone Sonik Ultrasonic Gas Leak Detector, SST, M25 with adjustable mount and sunshade
029-5402-200 Rugged Smart Hand Held (EU/UK)
029-5401-000 Zone 1 (IS) Rugged Smart Hand-Held (North America)*
029-5401-200 Zone 1 (15) Rugged Smart Hand-Held (EU)*
Accessories, Consumables & Spares
2331B1102 Pole mount kit for Searchzone Sonlk standard adjustable mounting bracket
2331B1112 Pole mount kit for Searchzone Sonik large adjustable mounting bracket
2331B1131 Searchzone Sonik SST sunshade
2331B1000 Searchzone Sonik Hand Held Test Unit*
2331B1020 Large mounting plate to suit larger poles
029-5403-000 Multi- Region Field Communicator Charger (US/EU/UK)
029-5410-000 USB Cable with IS Barrier for use with 029-5401-000/2000
Spares (Miscellaneous)
2331B1100 Standard mounting plate
2331B1130 Plastic sunshade
2331B1150 Terminal block set (5 pack)
2331B1160 Antenna cover (5 pack)
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