Jerome® J405

Mercury Vapor Analyzer

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.



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


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


Sturdy metal housing and solid-state design make the J405 tough enough for nearly any environment.


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


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


Ultra Low-Level Detection: The Jerome J405 can detect mercury 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 location.

Survey Mode: While in survey mode, the J405 continuously draws in samples of air in order to help locate the source of mercury contamination and allow 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.

Technical Data

Detection Range: 0.5 µg/m3 – 999 µg/m3
Resolution: 0.01 µg/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 Mode: Available in intervals of 1, 2, 5, 10, 15, 30, 45, 60, 90 or 120 minutes
Optional Integrated Data Storage:   20,000 samples; retains date, time and location
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, 3.2 A for the AC power supply/charger
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)
Certifications: TUV 61010, CE


Part Number Description
990-0193 Ammonia Filter
990-0217 Hard-Sided Carrying Case
990-0220 Soft-Sided Carrying Case
990-0223 10:1 Dilution Module
4000-1025 Power Supply/Charger
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 3940 Chlorine Filter

Parts & Consumables

Part Number Description
200-0143 Battery Pack Assembly
600-0262 Scrubber Filter w/ 2 Elbow Barbs
600-0293 AG Filter
1400 2002 Probe
2600 0036 Rubber Stopper #9, 2-Hole
2600 3039 Pack of 20 Fritware, .25 cm diameter
Z2600 3930 Scrubber Filter

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