Irrometer - Model LT Series - Tensiometer

The IRROMETER LT measures soil moisture by interacting with the soil through a porous ceramic tip. As soil dries, it tries to pull water out of the instrument, creating vacuum measured by the gauge. This is a direct, physical measurement of the same tension plant roots experience, requiring no electronics, batteries, or calibrations to operate. IRROMETER tensiometers have been on the market since 1951 and are proven by decades of commercial usage and field research, trusted enough to serve as the calibration standard for other sensors.

Available in different lengths to measure at desired depths in the root zone, the LT gauge can also be replaced with electronic options for data devices, or an automatic switch which can be triggered at desired soil water tension levels.

IRROMETER tensiometers are constructed of C.A.B., a durable, renewable, plastic designed for outdoor use. Fitted with stainless-steel gauges for many years of reliable service in field conditions, the gauges incorporate a membrane vent which allows them to maintain accuracy during changing conditions without sacrificing protection.

• 0-40 cb (kPa) range gauge for coarse, sandy, or potting-soil applications
• Replaceable ceramic tip
• Direct measurement of soil water tension
• Large reservoir for quick maintenance
• Stainless Steel IP 67 gauge designed for harsh environments
• Membrane vented gauge for temperature and elevation compensation

• MATERIALS: C.A.B plastic, ceramic, neoprene, EPDM, bronze, brass, stainless-steel
• TIP: LT (blue) threaded replaceable tip, suitable low-tension applications
• DIAL SIZE: 2.5 in. (63 mm)
• GAUGE CASE: AISI 304 Stainless steel membrane vented case, IP 67
• GAUGE WINDOW: Polycarbonate with EPDM gasket seal
• GAUGE DIAL: Scale of 0-40 cb (kPa), white with contrasting blue markings
• ACCURACY: +3-2-3% of gauge span, ASME B40.1 Grade B
• OPERATING TEMPERATURE: 33° to 150° F (0.5° to 65° C)
• WARRANTY: One year
• WEIGHT: 12” (30cm) instrument: 0.97 lb (0.44 kg), increasing 0.25 lb. (0.114 kg) per ft.
• DIMENSIONS:
• Reservoir Section: 5.125” (130 mm) ht, 2” (55 mm) dia
• Water Tube: 6” (1 5cm) to 60” (150 cm) len, .875” (22 mm) dia