{"title":"In-Situ Water Level \u0026 Flow","description":"\u003cp\u003eIn-Situ Level TROLL and Rugged TROLL pressure transducers and dataloggers, BaroTROLL barometric loggers, and the Level TROLL NC non-contact radar sensor.\u003c\/p\u003e","products":[{"product_id":"in-situ-level-troll-700-data-logger","title":"In-Situ Level TROLL 700 Data Logger","description":"\u003cp\u003eThe Level TROLL 700 is In-Situ's premier water level data logger, built specifically for aquifer characterization and other specialized groundwater and surface water monitoring. Its titanium housing, 4 MB memory (260,000 data points), higher data resolution, and advanced logging modes (including Linear, Fast Linear, Linear Average, Event, Step Linear, and True Logarithmic) make it the professional's choice for continuous, accurate water level, pressure, and temperature monitoring.\u003c\/p\u003e\u003cp\u003eEvery sensor undergoes 3D factory calibration across the full pressure and temperature range, with a unique anti-drift system — Kevlar-reinforced cables, piezoresistive titanium sensors, and tight-tolerance electronics — to hold accuracy for years in the field. Each instrument ships with a NIST-traceable calibration report. Integrates seamlessly with In-Situ's shared ecosystem of cables, in-well telemetry, VuSitu mobile app, and HydroVu Data Services.\u003c\/p\u003e\u003cp\u003eAvailable in vented (gauged) ranges up to 500 psig, or non-vented (absolute) ranges up to 1000 psia. The 700H variant exceeds USGS surface-water accuracy specifications (±0.01 ft up to 15 ft).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Twist-Lock Backshell\/Hanger sold separately. Need one, or other cables and accessories? Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-level-troll-parts-accessories\"\u003eIn-Situ Level TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"In-Situ","offers":[{"title":"Vented, 5 PSIG (3.5m \/ 11.5 ft)","offer_id":48159361925310,"sku":"0089110","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 15 PSIG (11m \/ 35 ft)","offer_id":48159361958078,"sku":"0089120","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 30 PSIG (21m \/ 69 ft)","offer_id":48159361990846,"sku":"0089130","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 100 PSIG (70m \/ 231 ft)","offer_id":48159362023614,"sku":"0089140","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 300 PSIG (211m \/ 692 ft)","offer_id":48159362056382,"sku":"0089150","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 500 PSIG (351m \/ 1153 ft)","offer_id":48159362089150,"sku":"0089160","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"700H, Vented, 15 PSIG","offer_id":48159362121918,"sku":"0089550","price":1848.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 30 PSIA (11m \/ 35 ft)","offer_id":48159362154686,"sku":"0089170","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 100 PSIA (60m \/ 197 ft)","offer_id":48159362187454,"sku":"0089180","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 300 PSIA (200m \/ 658 ft)","offer_id":48159362220222,"sku":"0089190","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 500 PSIA (341m \/ 1120 ft)","offer_id":48159362252990,"sku":"0089200","price":1648.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 1000 PSIA (693m \/ 2274 ft)","offer_id":48159362285758,"sku":"0089310","price":1648.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/level-troll-700-ar-16-9-w2000.jpg?v=1783969666"},{"product_id":"in-situ-level-troll-500-data-logger","title":"In-Situ Level TROLL 500 Data Logger","description":"\u003cp\u003eThe Level TROLL 500 is In-Situ's most popular water level data logger — a cost-effective, sub-1-inch instrument suited to a wide range of groundwater and surface water projects. It continuously logs water level, water pressure, and temperature, with vented (gauged) pressure ranges up to 500 psig for automatic atmospheric compensation, so there's no need to correct for barometric pressure changes after the fact.\u003c\/p\u003e\u003cp\u003eSolid titanium construction stands up to fresh, saline, and even contaminated water, and sensors are calibrated across the full pressure and temperature range for accurate, reliable data. Smart Addressing keeps every parameter mapped to the same Modbus address across In-Situ equipment, so you can swap devices without reprogramming. Integrates with VuLink telemetry and HydroVu Data Services for remote data access and automatic event alerts, and typically runs 10+ years on its internal battery.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Twist-Lock Backshell\/Hanger sold separately. Need one, or other cables and accessories? Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-level-troll-parts-accessories\"\u003eIn-Situ Level TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"In-Situ","offers":[{"title":"Vented, 5 PSIG (3.5m \/ 11.5 ft)","offer_id":48159362351294,"sku":"0089000","price":1354.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 15 PSIG (11m \/ 35 ft)","offer_id":48159362384062,"sku":"0089010","price":1354.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 30 PSIG (21m \/ 69 ft)","offer_id":48159362416830,"sku":"0089020","price":1354.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 100 PSIG (70m \/ 231 ft)","offer_id":48159362449598,"sku":"0089030","price":1354.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 300 PSIG (211m \/ 692 ft)","offer_id":48159362482366,"sku":"0089040","price":1354.0,"currency_code":"USD","in_stock":true},{"title":"Vented, 500 PSIG (351m \/ 1153 ft)","offer_id":48159362515134,"sku":"0089050","price":1354.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/in-situ_level_troll_family.jpg?v=1726762871"},{"product_id":"in-situ-level-troll-400-data-logger","title":"In-Situ Level TROLL 400 Data Logger","description":"\u003cp\u003eUnless you need vented level data, the Level TROLL 400 is In-Situ's low-maintenance option: it measures and logs water level, water pressure, and temperature in non-vented (absolute) pressure ranges, with no desiccant required. That makes it ideal for long-term monitoring at flood-prone or high-humidity sites where a vented cable isn't practical.\u003c\/p\u003e\u003cp\u003e3D factory calibration and In-Situ's anti-drift system keep readings accurate, and durable titanium construction withstands harsh conditions in fresh or saltwater, groundwater or surface water. As part of In-Situ's shared ecosystem, it integrates easily with accessories, in-well telemetry, VuLink, and HydroVu Data Services, and Smart Addressing means you can swap in another In-Situ device without reprogramming.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Twist-Lock Backshell\/Hanger sold separately. Need one, or other cables and accessories? Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-level-troll-parts-accessories\"\u003eIn-Situ Level TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"In-Situ","offers":[{"title":"Non-Vented, 30 PSIA (11m \/ 35 ft)","offer_id":48159363530942,"sku":"0099240","price":926.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 100 PSIA (60m \/ 197 ft)","offer_id":48159363563710,"sku":"0099250","price":926.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 300 PSIA (200m \/ 658 ft)","offer_id":48159363596478,"sku":"0099260","price":926.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 500 PSIA (341m \/ 1120 ft)","offer_id":48159363629246,"sku":"0099270","price":926.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/in-situ_level_troll_family.jpg?v=1726762871"},{"product_id":"in-situ-barotroll-data-logger","title":"In-Situ BaroTROLL Data Logger","description":"\u003cp\u003eThe BaroTROLL measures and logs barometric pressure and temperature so you can compensate non-vented (absolute) Level TROLL and Aqua TROLL 200 water level data for barometric effects. Requires a backshell or cable (sold separately).\u003c\/p\u003e\u003cp\u003eNeed a backshell, cable, or other accessories? Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-level-troll-parts-accessories\"\u003eIn-Situ Level TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e\u003ch1 style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/www.geotechenv.com\/pdf\/water_level_and_pressure\/in_situ_leveltroll.pdf\" target=\"_blank\"\u003e\u003cstrong\u003eSpec Sheet\u003c\/strong\u003e\u003c\/a\u003e\u003c\/h1\u003e","brand":"In-Situ","offers":[{"title":"1.14 bar (16.5 psi)","offer_id":48159364317374,"sku":"0089100","price":926.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/barotroll.jpg?v=1784148406"},{"product_id":"in-situ-level-troll-nc-non-contact-radar-level-sensor","title":"In-Situ Level TROLL NC Non-Contact Radar Level Sensor","description":"\u003cp\u003eThe Level TROLL NC is a high-performance, 80 GHz FMCW non-contact radar sensor for precise water level measurement in surface water, dredging, and coastal applications where a submerged instrument isn't practical. It integrates into In-Situ's shared ecosystem with a standard twist-lock connector, native SDI-12 and Modbus RS485 output, and the VuSitu mobile app for setup and data collection.\u003c\/p\u003e\u003cp\u003eA narrow 5° beam angle — needing just a 1 m (2.4 ft) diameter clear zone at 11.5 m (25 ft) range — gives you more flexibility to install in tight spaces than wider-beam radar sensors. In VuSitu, you can view the live echo curve to check signal return, fine-tune the Active Zone, and adjust Peak Detection for cleaner readings, plus confirm mount tilt with color-coded indicators. Built to withstand harsh weather for long-term, low-maintenance monitoring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The Level TROLL NC needs a TROLL Com Plus or VuLink telemetry (lithium batteries only, one instrument max) to power data collection. Mounting bracket sold separately — need one, or other accessories? Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-level-troll-parts-accessories\"\u003eIn-Situ Level TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"In-Situ","offers":[{"title":"15m (49 ft)","offer_id":48159364382910,"sku":"1022610","price":1468.0,"currency_code":"USD","in_stock":true},{"title":"30m (98 ft)","offer_id":48159364415678,"sku":"1022620","price":2332.0,"currency_code":"USD","in_stock":true},{"title":"50m (164 ft)","offer_id":48159364448446,"sku":"1022630","price":3083.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/In-SituNo-ContactSensor.png?v=1783970286"},{"product_id":"in-situ-rugged-troll-200-data-logger","title":"In-Situ Rugged TROLL 200 Data Logger","description":"\u003cp\u003eThe Rugged TROLL 200 is built for long- and short-term groundwater and surface water level monitoring, in pressure ranges up to 250 ft (76 m). Titanium and sealed construction — including a sealed battery to reduce potential leak paths — outperforms and outlasts specially coated data loggers, and 3D factory calibration with In-Situ's anti-drift system keeps it accurate for years of maintenance-free operation.\u003c\/p\u003e\u003cp\u003eSet up, view, and download logs directly from your phone or tablet with a TROLL Com Plus (sold separately) and the free VuSitu mobile app — tag data with site photos and GPS coordinates, then export in standard .csv format. Connect to VuLink telemetry for remote data access and automatic barometric compensation, or download with the Rugged TROLL Docking Station. Pair with a Rugged BaroTROLL (sold separately) for barometric compensation when needed. 1.03 in (2.62 cm) diameter, 2 MB memory (120,000 data sets \/ 360,000 data points).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Cable and communication accessories sold separately. Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-rugged-troll-parts-accessories\"\u003eIn-Situ Rugged TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"In-Situ","offers":[{"title":"Non-Vented, 0-9m (0-30 ft)","offer_id":48159397544126,"sku":"0091930","price":627.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 0-30m (0-100 ft)","offer_id":48159397576894,"sku":"0091940","price":627.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 0-76m (0-250 ft)","offer_id":48159397609662,"sku":"0091950","price":627.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/rugged-troll-200-header-w2000-4.jpg?v=1783970617"},{"product_id":"in-situ-rugged-barotroll-data-logger","title":"In-Situ Rugged BaroTROLL Data Logger","description":"\u003cp\u003eThe Rugged BaroTROLL measures and logs barometric pressure and temperature to compensate the Rugged TROLL 100 and 200's non-vented (absolute) water level data for barometric fluctuations. Titanium construction and a 10+ year internal battery keep it running maintenance-free for years in the field.\u003c\/p\u003e\u003cp\u003eQuick data access via telemetry, direct-read cable, or docking station. Pair with Baro Merge software to automatically post-correct water level measurements — apply a fixed correction, manually enter correction values, or correct multiple data logger files from a single BaroTROLL log file — then graph, report, and export to Excel or other applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e Titanium construction, 1-inch diameter. Need a docking station, cable, or other accessories? Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-rugged-troll-parts-accessories\"\u003eIn-Situ Rugged TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"In-Situ","offers":[{"title":"Default Title","offer_id":48162335391934,"sku":"0091900","price":432.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/rugged-baro-troll-16-9.jpg?v=1784030731"},{"product_id":"in-situ-rugged-troll-100-data-logger","title":"In-Situ Rugged TROLL 100 Data Logger","description":"\u003cp\u003eIn-Situ's most economical water level data logger, the Rugged TROLL 100 measures and logs water level, water pressure, and temperature in a durable titanium housing, with pressure ranges up to 250 ft (76 m). 3D factory calibration and In-Situ's anti-drift system keep it accurate for years of maintenance-free operation.\u003c\/p\u003e\u003cp\u003eBest suited to periodic data download rather than real-time access — retrieve logs with the Rugged TROLL Docking Station or a TROLL Com and the free VuSitu mobile app. Pair with the Rugged BaroTROLL (sold separately) for barometric compensation when needed. Titanium construction stands up to fresh, saline, and even contaminated water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Communication accessories sold separately. Visit \u003ca href=\"https:\/\/envirotechonline.com\/collections\/in-situ-rugged-troll-parts-accessories\"\u003eIn-Situ Rugged TROLL Parts \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e","brand":"In-Situ","offers":[{"title":"Non-Vented, 0-9m (0-30 ft)","offer_id":48162337521854,"sku":"0091870","price":432.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 0-30m (0-100 ft)","offer_id":48162337554622,"sku":"0091880","price":432.0,"currency_code":"USD","in_stock":true},{"title":"Non-Vented, 0-76m (0-250 ft)","offer_id":48162337587390,"sku":"0091890","price":432.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/RT100.jpg?v=1727814231"}],"url":"https:\/\/envirotechonline.com\/collections\/in-situ-water-level-flow.oembed","provider":"EnviroTech Services","version":"1.0","type":"link"}