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Jerome® J405

Gold Film Mercury Vapor Analyzer

The Jerome® J405 portable mercury vapor monitor is redefining the portable mercury vapor analyzer market. Significant performance enhancements and modern communications capabilities have been combined to create a new option for mercury spill detection and clean-up analysis.


The J405 utilizes the industry-proven, inherently stable and reliable gold film sensor technology and simple, one-button operation. The ergonomically-designed handle, lighter exterior case and significantly lower detection capabilities (0.5 µg/m3) make it a portable, easy to use, low-level mercury detection instrument.

  • Sensitive:

    With a detection limit of 0.5 µg/m3, the J405 is ideal for both industrial and residential cleanup settings.

  • Proven:

    Jerome® instruments have been recognized as the gold standard for mercury detection for over 35 years.

  • Rugged:

    Its sturdy metal housing makes the J405 tough enough for nearly any environment.

  • Reliable:

    With 24 hours of battery life per charge, the J405 is always ready when you need it.

  • Smart:

    Features onboard data logging for up to 20,000 measurements, USB data transfer, and SCADA interface capabilities through 4-20ma output.

Contact our sales team for more information on our Jerome series.

  • Specifications +

    Detection Range: 0.5 µg/m3– 999 µg/m3
    Resolution: 0.01 µg/m3(0.00001 mg/m3)
    Accuracy: ±10% at 1.0 µg/m3
    ±5% at 25 µg/m3
    ±5% at 100 µg/m3
    Response Time: Sample Mode: 16 seconds
    Survey Mode: 2 seconds
    Flow Rate: 750 ± 50 mL/min
    Result Units: µg/m3, mg/m3
    Autosample Intervals: 1, 2, 5, 10, 15, 30, 45, 60, 90 or 120 minutes
    Optional Integrated Data Storage: 20,000 test results; retains date, time and up to 80 locations
    Display: 3.5″ (9 cm) backlit LCD
    Battery: Rechargeable NiMH
    24 hour life, charges in 3 hours
    Power Requirements: 12 VDC for the instrument;
    100-240 VAC, 47-63 Hz, 1.3 A for the AC power supply
    Fuse: Auto-resetting fuse
    Operating Environment: 0°C to 45°C, non-condensing, non-explosive
    Output: Digital: USB serial data to PC, printer or USB flash drive
    Analog: 4-20 mA passive current loop; accurate to 0.3% of output
    Dimensions: 11″ L x 6″ W x 6.5″ H
    (28 cm L x 16 cm W x 17 cm H)
    Weight: 5.3 lbs. (2.4 kg)
    Analog: 4-20 mA passive current loop
    Warranty: 1 year, factory parts and labor
    Certifications: TUV 61010, CE

  • Features +

    Ultra Low-Level Detection: The Jerome J405 can detect mercury vapor in air at levels as low as 0.5 µg/m3 with a resolution of 0.01 µg/m3.

    Gold Film Sensor: Validated in the field and in the lab for over 35 years, our proprietary gold film sensor ensures repeatable results across a wide range of applications.

    Versatile: The J405 is in active use by many environmental agencies, industrial hygienists, miners and first response teams across the world.

    Regulatory Compliance: With a lower detection limit of 0.5 µg/m3, the J405 meets and exceeds EPA and ATSDR standards for industrial and residential remediation actions as well as OSHA, NIOSH, ACGIH and MSHA action levels.

    Optional Data Logging: When equipped with data logging capabilities, the J405 can store data for up to 20,000 samples including date, time and up to 80 locations.

    Survey Mode: While in survey mode, the J405 continuously draws in samples of air to help users locate the source of mercury contamination and enable corrective action to be taken.

    Field Regeneration: The J405 boasts a battery life of 24 hours and offers battery powered sensor regeneration that can be performed wherever and whenever you need it, allowing for extended testing in the field.

    Durable: Housed in a light, ergonomically designed, durable metal casing, the J405 sets a new precedent for portable, low-level mercury monitors.

    Intuitive Interface: The J405 offers simple, menu-driven operation as well as easy-to-understand diagnostics and error detection. It does not require PC software and comes with a USB interface for easy data transfer.

  • Documents & Downloads +

  • Accessories Parts Consumables +

    Part Number Description
    200-0143 Battery Pack Assembly
    600-0262 Scrubber Filter w/ 2 Elbow Barbs
    600-0293 AG Filter
    990-0193 Ammonia Filter
    990-0217 Hard-Sided Carrying Case
    990-0220 Soft-Sided Carrying Case
    990-0223 10:1 Dilution Module
    1400 2002 Probe
    2600 0036 Rubber Stopper #9, 2-Hole
    2600 3039 Pack of 20 Fritware, .25 cm diameter
    4000-1025 Power Supply/Charger
    6000 4003 Line Cord, 115 VAC
    Y405-0901 Accessory Kit (w/communications)
    Y405-0904 Accessory Kit (w/o communications)
    Y405-0903 Maintenance Kit
    Y431 0902 Functional Test Kit w/Mercury
    Y990-0191 Functional Test Kit w/o Mercury
    Y990-0260 Intake Kit
    Z2600 3905 Zero Air Filter
    Z2600 3930 Scrubber Filter
    Z2600 3940 Chlorine Filter